Fixes [BS-3374](https://linear.app/affine-design/issue/BS-3374/)
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## Summary by CodeRabbit
- **New Features**
- Improved control over when the peek view is shown in "edgeless" editor mode, ensuring it only activates when interacting directly with the relevant component.
- **Bug Fixes**
- Prevented unintended peek view activation in "edgeless" mode when clicking outside the associated component.
- **Tests**
- Added end-to-end test verifying the peek view does not open when content is covered by a canvas element.
- **Chores**
- Added utility function to streamline creating synced pages in edgeless mode during tests.
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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Added new export paths to improve module accessibility for foundation store and view components.
- Introduced new extension points for telemetry, font configuration, link preview cache, and peek view services in the view extension foundation.
- **Improvements**
- Enhanced flexibility by allowing optional configuration of placeholders in paragraph view extensions.
- Switched to runtime schema validation for font configuration, increasing reliability.
- Streamlined service registration for peek view providers.
- **Refactor**
- Centralized and simplified extension management by removing redundant extension files and consolidating setup logic.
- Updated internal integration of telemetry, font, and peek view services for improved maintainability.
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