Lexical 0.48 compatibility release.
Highlights:
- Updated the supported dependency line and API parity baseline to Lexical 0.48.
- Added custom Yjs shared-type root names to both collaboration plugins.
- Ported the Lexical 0.48 character-limit and read-only ContentEditable behavior.
- Preserved mouse-driven table selection across Chromium, Firefox, and WebKit.
- Added an explicit CI baseline guard for future Lexical minor releases.