Allow disabling external keyword exclusions about clojure-lsp

[julienvincent]

For any future readers - I have solved this problem for myself by overriding the treesitter highlight queries defined by the default clojure grammar.

This is my override which is based on: https://github.com/sogaiu/tree-sitter-clojure/blob/f4236d4da8aa92bc105d9c118746474c608e6af7/queries/highlights.scm

(kwd_name) @keyword
(kwd_ns) @namespace

(num_lit) @number

[
  (char_lit)
  (str_lit)
] @string

[
 (bool_lit)
 (nil_lit)
] @constant.builtin

;; Comments

(comment) @comment

;; Treat quasiquotation as operators for the purpose of highlighting.

[
 "'"
 "`"
 "~"
 "@"
 "~@"
] @operator