Close [BS-3268](https://linear.app/affine-design/issue/BS-3268/edgeless-下，-dark-mode-embed的配色应该更加清晰)
Close [BS-3067](https://linear.app/affine-design/issue/BS-3067/在embed上，添加split-view等相关的操作入口，基本接近page-block（见设计稿）)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced an interactive header for embedded synced documents with fold/unfold toggle, document opening, and multiple view options.
- Added info and copy link buttons for embedded synced documents and notes to improve document management and sharing.
- **Enhancements**
- Updated styles for embedded synced document blocks and headers for better visual consistency.
- Added new localization entries for header actions: "Fold", "Unfold", and "Open".
- Disabled redundant open document actions in toolbars, centralizing controls in the header.
- **Refactor**
- Unified header button components for notes and embedded synced documents into reusable components.
- Simplified header components by delegating button behaviors to shared components.
- **Bug Fixes**
- Fixed conditional rendering of editor content in embedded synced documents when folded.
- **Chores**
- Upgraded theme dependency version from "^1.1.12" to "^1.1.14" across multiple packages.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: BS-3364
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a new "Page Dragging Area" widget, enabling enhanced block selection and drag area detection within the user interface.
- Added utilities for more precise block selection based on rectangular selection areas.
- **Improvements**
- Integrated the new widget into the view extension system for consistent behavior across supported views.
- Enhanced clipboard handling with comprehensive adapter configurations for various data types.
- **Refactor**
- Streamlined widget registration and block selection logic for improved maintainability and modularity.
- Removed legacy widget exports and registrations to centralize widget management.
- **Chores**
- Updated workspace and TypeScript configurations to support the new widget module.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
