feat: add cpon

queries/cpon/highlights.scm

@@ -0,0 +1,45 @@
+; Literals
+
+(string) @string
+(escape_sequence) @string.escape
+
+(hex_blob
+  "x" @character.special
+  (_) @string)
+
+(esc_blob
+  "b" @character.special
+  (_) @string)
+
+(datetime
+  "d" @character.special
+  (_) @string.special)
+
+(number) @number
+
+(float) @float
+
+(boolean) @boolean
+
+(null) @constant.builtin
+
+; Punctuation
+
+[
+  ","
+  ":"
+] @punctuation.delimiter
+
+[ "{" "}" ] @punctuation.bracket
+
+[ "[" "]" ] @punctuation.bracket
+
+[ "<" ">" ] @punctuation.bracket
+
+; Comments
+
+(comment) @comment @spell
+
+; Errors
+
+(ERROR) @error