Folder streaming and resilience updates

• Added local folder streaming support for libraries outside Apple Photos.
• Added folder-stream thumbnails and improved stream source handling.
• Improved Photos permission denial handling and introduced server lifecycle refactoring for stability.

Collections, stream controls, and reliability improvements

• Added collection editing and improved collection management workflows.
• Added sidebar search, sort, and stream control polish.
• Added deferred startup, improved indexing progress state, and HTTPS startup/keychain fixes.

Initial stream engine and Apple Photos support

• Added photo stream foundation with smart Apple Photos library filtering.
• Added HTTPS support with custom certificates and improved settings UX.
• Improved launch stability and crash/race-condition handling early in release lifecycle.