* General proofreading for grammar and spelling
* General formatting
* Addition of appropriate literals where appropriate, i.e. `&"foo"` for `StringName` cases and `^"foo/bar"` for `NodePath` cases
- Add runtime MP3 and WAV loading with example files.
- Add runtime FBX loading (but no example files, due to known issues with
the current FBX runtime loading implementation).
- Use supersampling for the 3D preview to further improve quality.
- Shorten file path to example glTF scene.
- Mention audio duration in the UI when loading an audio file.
