Documentation Parity & Performance

Malachite Documentation Updated the documentation for Malachite to reflect the newly added support for Apple Music and YouTube Music imports. This ensures that users have up-to-date instructions for migrating their data. Performance Optimization - Bundle Size: Eliminated a 1.3MB client bundle overhead by optimizing markdown and AT Protocol dependencies. - Sidebar: Added a direct link to the devlog in the docsite sidebar for better cross-project navigation. - Cleanup: Reverted the Sequoia documentation as the docsite is now strictly focused on my own projects.