Better gdscript-ts-mode highlighting

[TideSofDarK]

• Support for annotations
• Support for punctuation
• More operators
• Regex-based types and keywords, added missing ones
• Regex-based constants
• Moved feature list to defvar so it's possible to modify in user configs
• Removed variable highlighting for more consistency among different color themes

Before/After Screenshots

[TideSofDarK]

Regarding escape sequences:
C/C++ goes like (string (string_contents) (escape_sequence) (string_contents))
GDScript goes (string " (escape_sequence) ") and I couldn't make it work properly with higher priority (escape_sequence) making string white (default face).
Let me know if it can be fixed.

[TideSofDarK]

Do we want different face for "basic" types such as Array, Vector3 etc?
We can use font-lock-builtin-face for that.
But I don't mind all types having the same color and would rather use that face for resource paths, what do you think?

[xiliuya]

Regarding escape sequences: C/C++ goes like (string (string_contents) (escape_sequence) (string_contents)) GDScript goes (string " (escape_sequence) ") and I couldn't make it work properly with higher priority (escape_sequence) making string white (default face). Let me know if it can be fixed.

Use this patch will fix, but operator-face still not work in eask emacs.

diff --git a/gdscript-ts-mode.el b/gdscript-ts-mode.el
index efdb063..5a6e3f1 100644
--- a/gdscript-ts-mode.el
+++ b/gdscript-ts-mode.el
@@ -176,9 +176,11 @@ It must be a function with two arguments: TYPE and NAME.")
    :language 'gdscript
    `(["+" "+="   "-" "-=" "*" "*=" "/" "/=" "^"  "^="  ">"  ">="
       "<" "<="   "|" "|=" "%" "%=" "&" "&=" ">>" ">>=" "<<" "<<="
-      "||" "&&" "==" "!=" "->" "~" "=" ":="] @font-lock-operator-face)
+      "||" "&&" "==" "!=" "->" "~" "=" ":="]
+     @font-lock-operator-face)

    :language 'gdscript
+   :override t
    :feature 'escape-sequence
    '((escape_sequence) @font-lock-escape-face)))

[xiliuya]

LGTM.
Nice work!

[NathanLovato]

Thank you very much for taking the time to contribute!