<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced two new widgets: Edgeless Dragging Area and Note Slicer, now available for use.
- Added extension support for these widgets, enabling enhanced interaction and integration within the application.
- **Chores**
- Updated package configurations and workspace settings to include the new widgets and their dependencies.
- Added project references and configuration files to support modular development and build processes.
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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced the Edgeless Selected Rectangle widget, providing enhanced selection and interaction capabilities in edgeless mode.
- Added rotation-aware resize cursors for improved usability when resizing selections.
- Integrated new autocomplete panels and selection components for a smoother user experience.
- **Refactor**
- Modularized the Edgeless Selected Rectangle widget as a standalone package for better maintainability and integration.
- Updated internal references and imports to utilize the new widget package.
- **Chores**
- Updated project and package configurations to include the new widget and ensure proper build and type-checking across the workspace.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: BS-3202
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced new root block store and view extensions, enhancing modularity and integration options for root block functionality.
- Exported the EdgelessLocker class for broader usage.
- **Improvements**
- Updated export paths for root block modules, enabling clearer and more flexible module access.
- Enhanced view extension setup to better tailor user interface and interactions based on context.
- **Removals**
- Removed legacy migrating store and view extension logic, streamlining extension management and reducing unused code.
- Removed multiple deprecated block specifications and common extension collections to simplify the codebase.
- Deleted AI page root block specification, retaining only lifecycle watcher functionality.
- **Chores**
- Updated dependencies and project references to support new extension loader integration.
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