Closes: [BS-3291](https://linear.app/affine-design/issue/BS-3291/工具栏展开时报错，链接无法点击打开)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- URLs entered without a protocol (e.g., "github.com/...") are now automatically normalized to use "https://", ensuring links are secure and consistently formatted.
- **Bug Fixes**
- Improved handling and validation of links to prevent issues with missing or invalid protocols in bookmarks and inline links.
- Simplified URL validation logic by leveraging native URL parsing, removing complex regex and email-specific checks.
- Streamlined toolbar link actions to operate only on valid normalized URLs.
- Refined URL detection in markdown preprocessing to exclude lines containing spaces from being treated as URLs.
- **Tests**
- Added tests to verify that links without a protocol are correctly normalized and displayed across different views.
- Updated URL validation tests to better reflect valid and invalid URL formats, including IP addresses and domain variants.
- **Style**
- Updated snapshots to reflect the use of "https://" in links.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
