Adds GDScript, Godot resource and shader file types with tree-sitter highlighting, the GDScript language server over TCP (a headless Godot editor started on demand), "Godot Project" / current-scene run configurations, and debugging through Godot's debug adapter.
Breakpoints set through symlinked paths (/tmp, /var on macOS) were reported verified but never hit; the adapter now sends resolved paths and maps stack frames back to the paths the IDE opened. The duplicate exit event Godot sends after disconnect is ignored.
Fixes#68
Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn
