update textmate grammar

[zacccharv]

1. Added export_tool_button Annotation Support

I've added the export_tool_button keyword to the annotation term match list in the grammar file. That way the syntax highlighter properly recognizes and styles this annotation in VScode.

"annotations": {
	"match": "(@)(export|export_group|export_color_no_alpha|export_custom|export_dir|export_enum|export_exp_easing|export_tool_button|export_file|export_flags|export_flags_2d_navigation|export_flags_2d_physics|export_flags_2d_render|export_flags_3d_navigation|export_flags_3d_physics|export_flags_3d_render|export_global_dir|export_global_file|export_multiline|export_node_path|export_placeholder|export_range|export_storage|icon|onready|rpc|tool|warning_ignore|static_unload)\\b",
	"captures": {
		"1": { "name": "entity.name.function.decorator.gdscript" },
		"2": { "name": "entity.name.function.decorator.gdscript" }
	}
},

---

2. Added Variable Declaration Name Grammar Support

I've implemented grammar support for variable field name declarations with this pattern:
Also wanted to add grammar support for variable field name declarations like this:

"variable_declaration_name": {
	"name": "meta.variable.declaration.name.gdscript",
	"begin": "(?<=\\b(var|const)\\s+)",
	"end": "(?!\\s*:=)(?!\\w*)|([A-Za-z_]\\w*)",
	"patterns": [
		{ "include": "#any_variable" }
	]
},

This would:

1. Start capturing text right after seeing "var " or "const "
2. Capture the variable name or "#any_variable" (which must follow GDScript naming rules)
3. Stop capturing when it reaches something that's not part of the variable name or when it completes capturing a valid identifier

[DaelonSuzuka]

What's the point of the second change? I'm pretty sure variable declarations are already covered.

[zacccharv]

What's the point of the second change? I'm pretty sure variable declarations are already covered.

Variable declaration is supported but the entire declaration is in scope, so for example this entire line is the variable declaration:

var my_variable: String = "test string"

What I wanted was a textmate scope just for the variable field name so just my_variable when it's first declared

[DaelonSuzuka]

Yes, the variable name is already being tagged as variable.other.gdscript.

[zacccharv]

@DaelonSuzuka in that example it works however every time any variable comes up in the meta.variable.declaration.gdscript wether declared beforee or not it's labaled as variable.other.gdscript

Screen.Recording.2025-04-01.174718.mp4

[zacccharv]

Here's the difference with my added scope.

Screen.Recording.2025-04-01.175750.mp4