Add new Syntax Highlighting for Godot 4

[Maximinodotpy]

No description provided.

[Calinou]

Note that this likely has to be done in a way that remains compatible with Godot 3.x GDScript, so that existing highlighting isn't broken. This means highlighting for keywords removed in Godot 4.x should be kept.

[accidentallyc]

Hi there! I also started using this library. And I quickly realized it was missing gdscript-4 stuff.

I'd be happy to contribute/add godot4 changes if nobodys doing it, unless someone else was already doing it

[Calinou]

I'm not currently working on this, so feel free to open a PR 🙂

Other highlighters to use as a reference:

• Pygments: https://github.com/godotengine/godot-docs/blob/master/_extensions/gdscript.py
• TextMate: https://github.com/godotengine/godot-vscode-plugin/blob/master/syntaxes/GDScript.tmLanguage.json
  • Also check Improved GDScript.tmLanguage.json godotengine/godot-vscode-plugin#740 which fully updates it for 4.3.