be278fb1dc
- Added a new module for editor UI widgets, including ScrollViewBuilder, CoreScrollArea, ExpansionButton, BasicPanel, and ScrollableContainer. - Implemented basic theme support with EditorTheme struct. - Created a Panel widget with collapsible and resizable features. - Developed a scrollable area widget with mouse wheel support and content height calculation methods. - Added examples for using scroll widgets and programmatic scrolling. - Introduced a simple panel widget with configurable dimensions and styling. - Implemented a simple scrollable container with mouse wheel support. - Established a theming system compatible with bevy_feathers, including themed UI elements and a theme management plugin.