Dashboard Widget for Blocks Collaboratives Notes

0.1

• Initial release: added dashboard widget listing Gutenberg Notes assigned to the current user.
• Optimized note retrieval with direct DB filtering and deterministic comment loading.
• Filtered out empty notes and excluded notes/posts in the trash.
• Added defensive checks to ensure notes are shown only for posts belonging to the current user.
• Implemented transient caching per user (5 minutes) and cache invalidation hooks on comment changes.
• Internationalization support.
• Finalized English readme and documentation.