FWIW you can easily open up the text files in VS Code. Last time I was messing with it, I tried to find a way to integrate it more, and I think you can set it as the editor's default text editor.

Godot supports editing in external editors far more seamlessly than Unity, in my experience. You don't ever need to use the built-in editor.

There is now a language server which facilitates the use of 3rd-party editors like VS Code.