* Updated Godot icons (and removed old ones)
* Improve "Debug Pinned Scene" command by making the pinned scene persist between VSCode sessions
* Fix scene file highlighting not working
* Fix ScenePreview not working in Godot 3
* Add buttons for relevant actions to ScenePreview items
* Add internal document links for SubResource() and ExtResource() statements in scene files
* Add hover for SubResource() and ExtResource() statements in scene files
* Improve ability to right click -> open docs for methods of builtin types (doesn't always work)
* Add a file decorator to show the pinned debug file in the filesystem view/editor tabs
* Add item decorators to the Scene Preview to show Node attributes more clearly
* Updated readme
* Overhauled documentation viewer
* Added GDScript formatter
* Add (disabled) experimental providers for custom completions, semantic tokens, and tasks
* Lots of internal refactoring
