New Features:
- Added a visual OTUI editor for previewing and editing .otui files, including live preview, widget selection, and editing of properties, anchors, geometry and states.
- Supports adding/removing widgets and properties, creating new screens, and saving back with safety checks and backups.
- Included file/style/anchor pickers and a style gallery with live samples.
- Added an OTML parser/writer to preserve and apply line-accurate edits.
Documentation:
- Added comprehensive editor documentation, workflows and operational notes.
