### TL;DR
Refactored `SpecProvider` singleton access pattern and reorganized adapter/extension code structure.
### What changed?
- Changed `SpecProvider.getInstance()` to `SpecProvider._` for cleaner singleton access
- Moved adapter/extension code from `_common` directory to dedicated `adapters` and `extensions` folders
- Consolidated adapter extensions into a single file
- Removed unused dependencies from package.json
- Deleted unnecessary schema files
- Extracted `MobileSpecsPatches` class into the mobile patching code
- Updated all references to use the new `SpecProvider._` accessor
### How to test?
- Verify all specs are properly registered and accessible via `SpecProvider._`
- Test adapter functionality for HTML, Markdown, Notion HTML and plain text
- Check mobile-specific features and patches work correctly
- Ensure preview functionality works in both page and edgeless modes
### Why make this change?
- Improves code organization by properly separating adapters and extensions
- Simplifies singleton access pattern
- Removes unnecessary dependencies and files
- Makes the codebase more maintainable by consolidating related functionality
### TL;DR
Refactored editor access to use `EditorHost` instead of `AffineEditorContainer` and updated mode access through `DocModeProvider`.
### What changed?
- Changed editor property types from `AffineEditorContainer` to `EditorHost` across multiple components
- Updated mode access to use `DocModeProvider` service instead of direct editor mode access
- Modified editor references to use `editor.host` where appropriate
- Updated scroll and highlight utilities to work with `EditorHost`
### How to test?
1. Open a document in both page and edgeless modes
2. Verify outline panel functionality works as expected
3. Test outline viewer navigation and highlighting
4. Confirm mobile outline menu operates correctly
5. Check that frame panel and TOC features work in all modes
### Why make this change?
This change improves architectural consistency by using `EditorHost` directly and accessing mode through the proper service provider. This makes the code more maintainable and follows better dependency practices by using the correct abstraction levels.
Close [BS-2458](https://linear.app/affine-design/issue/BS-2458/toc-dnd重构)
### What Changes
- Refactor toc note card dnd with `std.dnd`
- Extract note display mode change to command `changeNoteDisplayMode`
- It will reorder notes when the display mode changed from `EdgelessOnly` to page mode visible (a.k.a `DocOnly` or `Both`)
### Changed
Add `scroll wheel to zoom` setting option, when the option enables, user can zoom in and out with scroll wheel without pressing the cmd/ctrl key.
