feat: add capnp (#4203)

queries/capnp/highlights.scm

@@ -0,0 +1,124 @@
+; Preproc (?)
+
+(unique_id) @preproc
+
+; Includes
+
+[
+  "import"
+  "$import"
+  "embed"
+] @include
+
+(import_path) @string
+
+; Types
+
+(primitive_type) @type.builtin
+
+[
+  "annotation"
+  "enum"
+  "group"
+  "interface"
+  "List"
+  "struct"
+  "union"
+] @type.builtin
+
+; Typedefs
+
+(type_definition) @type.definition
+
+; Labels (@number, @number!)
+
+(field_version) @label
+
+; Methods
+
+(method_identifier) @method
+
+; Fields
+
+(field_identifier) @field
+
+; Parameters
+
+(param_identifier) @parameter
+(return_identifier) @parameter
+
+; Variables
+
+(identifier) @variable
+
+; Constants
+
+(const_identifier) @constant
+(enum_member) @constant
+
+; Types
+
+(enum_identifier) @type
+(extend_type) @type
+(field_type) @type
+(generic_identifier) @type
+(type_identifier) @type
+
+; Attributes
+
+(attribute) @attribute
+(annotation_identifier) @attribute
+
+; Operators
+
+[
+ ; @ ! -
+  "="
+] @operator
+
+; Keywords
+
+[
+  "extends"
+  "namespace"
+  "using"
+] @keyword
+
+; Literals
+
+(string_literal) @string
+
+(data_string) @string.special
+(namespace) @string.special
+
+(number) @number
+
+(float) @float
+
+(boolean) @boolean
+
+; Misc
+
+[
+  "const"
+] @type.qualifier
+
+[
+  "*"
+] @punctuation.special
+
+["{" "}"] @punctuation.bracket
+
+["(" ")"] @punctuation.bracket
+
+["[" "]"] @punctuation.bracket
+
+[
+  ","
+  ";"
+  "->"
+] @punctuation.delimiter
+
+; Comments
+
+(comment) @comment @spell