Feat: Add unison (#5340)

* Add unison

* Trivial change to force prepush hook

* Undo change

* PR Feedback - remove appended text in query after variable, update lockfile, remove main branch specification in parser

* Replacing captures with only ones in the contributing.md

* Fix typo

* Generate from grammar

* First group of suggested changes

* Update gt operator

* Remove outer parens

* Remove maybe.c

* Add comment injection

queries/unison/highlights.scm

@@ -0,0 +1,73 @@
+;; Primitives
+(comment) @comment @spell
+(nat) @number
+(unit) @constant.builtin
+(literal_char) @character
+(literal_text) @string
+(literal_boolean) @boolean
+
+;; Keywords
+[
+  (kw_forall)
+  (unique_kw)
+  (type_kw)
+  (do)
+  (kw_let)
+] @keyword
+
+(kw_equals) @keyword.operator
+(structural_kw) @type.qualifier
+(unique) @type.qualifier
+
+(type_constructor) @constructor
+
+(doc_block) @comment.documentation
+
+
+[
+  (operator)
+  (pipe) 
+  (arrow_symbol) 
+  ">"
+  (or)
+] @keyword.operator
+
+[
+  "if"
+  "else"
+  "then"
+  (match)
+  (with)
+  (cases)
+] @conditional
+
+(blank_pattern) @variable.builtin
+
+(pattern) @variable (constructor_or_variable_pattern) @type
+
+(use_clause) @include
+
+;; Types
+(record_field name: (wordy_id) @variable type: (wordy_id) @type)
+[
+  (type_name)
+  (type_signature)
+  (effect)
+] @type
+
+(term_definition) @variable
+
+;; Punctuation
+[
+  (type_signature_colon)
+  ":"
+] @punctuation.delimiter
+
+[
+  "("
+  ")"
+  "{"
+  "}"
+  "["
+  "]"
+] @punctuation.bracket

queries/unison/injections.scm

@@ -0,0 +1,2 @@
+((comment) @injection.content
+ (#set! injection.language "comment"))