feat: add haskell highlights

queries/haskell/highlights.scm

@@ -0,0 +1,91 @@
+(integer) @number
+(exp_literal (float)) @float
+
+(char) @character
+
+(string) @string
+
+(variable) @variable
+
+(con_unit) @symbol
+
+(comment) @comment
+
+(function name: (variable) @function)
+
+[
+  "forall"
+  "∀"
+] @repeat
+
+(pragma) @constant.macro
+
+[
+  "if"
+  "then"
+  "else"
+] @conditional
+
+[
+  (constructor)
+  (module)
+] @constructor
+
+;; True or False
+((constructor) @_bool (#match? @_bool "(True|False)")) @boolean
+
+(signature name: (variable) @type)
+(constraint class: (class_name (type)) @type)
+(class (class_head class: (class_name (type)) @type))
+(instance (instance_head class: (class_name (type)) @type))
+
+[
+  (type)
+] @type
+
+[
+  (qualified_module) ;; grabs the `.` (dot), ex: import System.IO
+  (tycon_arrow)
+  (operator)
+  (constructor_operator)
+  "::"
+] @operator
+
+[
+  "import"
+  "module"
+] @include
+
+[
+  (where)
+  "let"
+  "in"
+  "class"
+  "instance"
+  "data"
+  "newtype"
+  "family"
+  "type"
+  "qualified"
+  "as"
+  "deriving"
+  "via"
+  "stock"
+  "anyclass"
+  "do"
+  "mdo"
+  "rec"
+] @keyword
+
+[
+  "("
+  ")"
+  "{"
+  "}"
+  "["
+  "]"
+] @punctuation.bracket
+
+; [
+;   ","
+; ] @punctuation.delimiter