feat!: align standard captures with upstream

Problem: Sharing highlight queries with upstream tree-sitter and
Helix is difficult.

Solution: Where reasonable, use capture names in tree-sitter's standard
list or Helix's Atom-style hierarchy.

Specifically:

* tree-sitter "standard capture names"
  (3f44b89685/highlight/src/lib.rs (L20-L72)):

  - `@parameter` -> `@variable.parameter`
  - `@field` -> `@variable.member`
  - `@namespace` -> `@module`
  - `@float` -> `@number.float`
  - `@symbol` -> `@string.special.symbol`
  - `@string.regex` -> `@string.regexp`
  - `@text.*` -> `@markup.*` (`strong`, `italic`, `link`, `strikethrough`; with exceptions; see below)
  - `@text.title` -> `@markup.heading`
  - `@text.literal` -> `@markup.raw`
  - `@text.reference` -> `@markup.link`
  - `@text.uri` -> `@markup.link.url` (in markup links)
  - `@string.special` -> `@markup.link.label` (non-url links)
  - `@punctuation.special` -> `@markup.list` (markdown lists only; move subitems from `@text.todo`)

* Helix captures
  (https://docs.helix-editor.com/master/themes.html#syntax-highlighting):

  - `@method` -> `@function.method`
  - `@method.call` -> `@function.method.call`
  - `@text.{todo,warning,note,danger}` -> `@comment.{error,warning,hint,info,todo}`
  - `@text.diff.{add,delete,}` -> `@diff.{plus,minus,delta}`
  - `@text.uri` -> `@string.special.url` (outside markup)
  - `@preproc` -> `@keyword.directive`
  - `@define` -> `@keyword.directive`(`.define`?)
  - `@storageclass` -> `@keyword.storage`
  - `@conditional` -> `@keyword.conditional`
  - `@debug` -> `@keyword.debug`
  - `@exception` -> `@keyword.exception`
  - `@include` -> `@keyword.import`
  - `@repeat` -> `@keyword.repeat`

* cleanup

  - remove some redundant `@conceal` (but still allow it for conceal-only patterns)
  - remove obsolete `@error` (syntax linting is out of scope for this repo)
  - sort, cleanup capture list in `CONTRIBUTING.md`

queries/latex/highlights.scm

@@ -6,7 +6,7 @@
   command: _ @function)
 
 (key_value_pair
-  key: (_) @parameter
+  key: (_) @variable.parameter
   value: (_))
 
 [
@@ -15,13 +15,13 @@
  (comment_environment)
 ] @comment @spell
 
-((line_comment) @preproc
-  (#lua-match? @preproc "^%% !TeX"))
+((line_comment) @keyword.directive
+  (#lua-match? @keyword.directive "^%% !TeX"))
 
 [
  (brack_group)
  (brack_group_argc)
-] @parameter
+] @variable.parameter
 
 [(operator) "="] @operator
 
@@ -34,12 +34,12 @@
 
 ;; General environments
 (begin
- command: _ @text.environment
- name: (curly_group_text (text) @text.environment.name))
+ command: _ @markup.environment
+ name: (curly_group_text (text) @markup.environment.name))
 
 (end
- command: _ @text.environment
- name: (curly_group_text (text) @text.environment.name))
+ command: _ @markup.environment
+ name: (curly_group_text (text) @markup.environment.name))
 
 ;; Definitions and references
 (new_command_definition
@@ -54,11 +54,11 @@
 
 (environment_definition
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference))
+ name: (curly_group_text (_) @markup.link))
 
 (theorem_definition
  command: _ @function.macro
- name: (curly_group_text (_) @text.environment.name))
+ name: (curly_group_text (_) @markup.environment.name))
 
 (paired_delimiter_definition
  command: _ @function.macro
@@ -66,178 +66,178 @@
 
 (label_definition
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference))
+ name: (curly_group_text (_) @markup.link))
 (label_reference_range
  command: _ @function.macro
- from: (curly_group_text (_) @text.reference)
- to: (curly_group_text (_) @text.reference))
+ from: (curly_group_text (_) @markup.link)
+ to: (curly_group_text (_) @markup.link))
 (label_reference
  command: _ @function.macro
- names: (curly_group_text_list (_) @text.reference))
+ names: (curly_group_text_list (_) @markup.link))
 (label_number
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference)
- number: (_) @text.reference)
+ name: (curly_group_text (_) @markup.link)
+ number: (_) @markup.link)
 
 (citation
  command: _ @function.macro
- keys: (curly_group_text_list) @text.reference)
+ keys: (curly_group_text_list) @markup.link)
 
 (glossary_entry_definition
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference))
+ name: (curly_group_text (_) @markup.link))
 (glossary_entry_reference
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference))
+ name: (curly_group_text (_) @markup.link))
 
 (acronym_definition
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference))
+ name: (curly_group_text (_) @markup.link))
 (acronym_reference
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference))
+ name: (curly_group_text (_) @markup.link))
 
 (color_definition
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference))
+ name: (curly_group_text (_) @markup.link))
 (color_reference
  command: _ @function.macro
- name: (curly_group_text (_) @text.reference))
+ name: (curly_group_text (_) @markup.link))
 
 ;; Math
 [
  (displayed_equation)
  (inline_formula)
-] @text.math
+] @markup.math
 
 (math_environment
   (begin
-   command: _ @text.math
-   name: (curly_group_text (text) @text.math)))
+   command: _ @markup.math
+   name: (curly_group_text (text) @markup.math)))
 
 (math_environment
-  (text) @text.math)
+  (text) @markup.math)
 
 (math_environment
   (end
-   command: _ @text.math
-   name: (curly_group_text (text) @text.math)))
+   command: _ @markup.math
+   name: (curly_group_text (text) @markup.math)))
 
 ;; Sectioning
 (title_declaration
-  command: _ @namespace
-  options: (brack_group (_) @text.title.1)?
-  text: (curly_group (_) @text.title.1))
+  command: _ @module
+  options: (brack_group (_) @markup.heading.1)?
+  text: (curly_group (_) @markup.heading.1))
 
 (author_declaration
-  command: _ @namespace
+  command: _ @module
   authors: (curly_group_author_list
-             ((author)+ @text.title.1)))
+             ((author)+ @markup.heading.1)))
 
 (chapter
-  command: _ @namespace
-  toc: (brack_group (_) @text.title.2)?
-  text: (curly_group (_) @text.title.2))
+  command: _ @module
+  toc: (brack_group (_) @markup.heading.2)?
+  text: (curly_group (_) @markup.heading.2))
 
 (part
-  command: _ @namespace
-  toc: (brack_group (_) @text.title.2)?
-  text: (curly_group (_) @text.title.2))
+  command: _ @module
+  toc: (brack_group (_) @markup.heading.2)?
+  text: (curly_group (_) @markup.heading.2))
 
 (section
-  command: _ @namespace
-  toc: (brack_group (_) @text.title.3)?
-  text: (curly_group (_) @text.title.3))
+  command: _ @module
+  toc: (brack_group (_) @markup.heading.3)?
+  text: (curly_group (_) @markup.heading.3))
 
 (subsection
-  command: _ @namespace
-  toc: (brack_group (_) @text.title.4)?
-  text: (curly_group (_) @text.title.4))
+  command: _ @module
+  toc: (brack_group (_) @markup.heading.4)?
+  text: (curly_group (_) @markup.heading.4))
 
 (subsubsection
-  command: _ @namespace
-  toc: (brack_group (_) @text.title.5)?
-  text: (curly_group (_) @text.title.5))
+  command: _ @module
+  toc: (brack_group (_) @markup.heading.5)?
+  text: (curly_group (_) @markup.heading.5))
 
 (paragraph
-  command: _ @namespace
-  toc: (brack_group (_) @text.title.6)?
-  text: (curly_group (_) @text.title.6))
+  command: _ @module
+  toc: (brack_group (_) @markup.heading.6)?
+  text: (curly_group (_) @markup.heading.6))
 
 (subparagraph
-  command: _ @namespace
-  toc: (brack_group (_) @text.title.6)?
-  text: (curly_group (_) @text.title.6))
+  command: _ @module
+  toc: (brack_group (_) @markup.heading.6)?
+  text: (curly_group (_) @markup.heading.6))
 
 ;; Beamer frames
 (generic_environment
   (begin
     name: (curly_group_text
-            (text) @text.environment.name)
-    (#any-of? @text.environment.name "frame"))
+            (text) @markup.environment.name)
+    (#any-of? @markup.environment.name "frame"))
   .
-  (curly_group (_) @text.title))
+  (curly_group (_) @markup.heading))
 
 ((generic_command
   command: (command_name) @_name
   arg: (curly_group
-          (text) @text.title))
+          (text) @markup.heading))
  (#eq? @_name "\\frametitle"))
 
 ;; Formatting
 (text_mode
-  content: (curly_group (_) @text))
+  content: (curly_group (_) @none @spell))
 
 ((generic_command
   command: (command_name) @_name
-  arg: (curly_group (_) @text.emphasis))
+  arg: (curly_group (_) @markup.italic))
   (#eq? @_name "\\emph"))
 
 ((generic_command
   command: (command_name) @_name
-  arg: (curly_group (_) @text.emphasis))
+  arg: (curly_group (_) @markup.italic))
  (#any-of? @_name "\\textit" "\\mathit"))
 
 ((generic_command
   command: (command_name) @_name
-  arg: (curly_group (_) @text.strong))
+  arg: (curly_group (_) @markup.strong))
  (#any-of? @_name "\\textbf" "\\mathbf"))
 
 ((generic_command
   command: (command_name) @_name
   .
-  arg: (curly_group (_) @text.uri))
+  arg: (curly_group (_) @markup.link.url))
  (#any-of? @_name "\\url" "\\href"))
 
 ;; File inclusion commands
 (class_include
-  command: _ @include
+  command: _ @keyword.import
   path: (curly_group_path) @string)
 
 (package_include
-  command: _ @include
+  command: _ @keyword.import
   paths: (curly_group_path_list) @string)
 
 (latex_include
-  command: _ @include
+  command: _ @keyword.import
   path: (curly_group_path) @string)
 (import_include
-  command: _ @include
+  command: _ @keyword.import
   directory: (curly_group_path) @string
   file: (curly_group_path) @string)
 
 (bibtex_include
-  command: _ @include
+  command: _ @keyword.import
   path: (curly_group_path) @string)
 (biblatex_include
-  "\\addbibresource" @include
-  glob: (curly_group_glob_pattern) @string.regex)
+  "\\addbibresource" @keyword.import
+  glob: (curly_group_glob_pattern) @string.regexp)
 
 (graphics_include
-  command: _ @include
+  command: _ @keyword.import
   path: (curly_group_path) @string)
 (tikz_library_import
-  command: _ @include
+  command: _ @keyword.import
   paths: (curly_group_path_list) @string)
 
 (text) @spell