Improve Godot run commands with scene picking and script-aware scene resolution

[Mathijs-Bakker]

Summary

This PR expands the plugin’s non-DAP run workflow so Godot projects and scenes can be launched directly from Neovim.

It adds run commands for projects and scenes, optional Telescope-based scene picking, and improves :GodotRunCurrentScene so it also works from .gd and .cs buffers when those scripts are attached to a scene.

Changes

• Add non-DAP run commands:
  • :GodotRunProject
  • :GodotRunCurrentScene
  • :GodotRunScene {path}
  • :GodotRunScenePicker
• Make :GodotRunCurrentScene work from:
  • .tscn buffers
  • .gd buffers attached to a scene
  • .cs buffers attached to a scene
• When multiple scenes reference the current script, use Telescope to let the user choose one
• Keep Telescope optional:
  • :GodotRunScenePicker requires Telescope
  • core run commands do not
• Document the new commands and behavior in README/help
• Add headless tests for:
  • command registration
  • project launching
  • current scene launching from .tscn
  • scene resolution from .gd / .cs
  • Telescope picker behavior
  • invalid scene path rejection

Why

Opening a .tscn directly in Neovim is not the common workflow in Godot projects. Most of the time, users are editing a script attached to a scene, so :GodotRunCurrentScene needs to work from the current script buffer to be practical.

Testing

• Ran nvim --headless -u NONE -c "luafile tests/run.lua" -c "qa!"
• All 36 tests passed

Related

Closes #28