0.5.8-beta.6

Changed

• Added a central provider module registry for approved integrations. Public
  builds currently include only Modrinth and CurseForge.
• Removed FTB, FTB Legacy, ATLauncher, and Technic implementation code, IPC
  channels, and build flags from the application and public release source
  pending provider approval. Local reference modules are excluded from Git.

Fixed

• CurseForge API responses are no longer cached by the relay, and CurseForge
  gallery screenshots are now fetched live without being saved to instance
  records. Existing saved CurseForge screenshot URLs are removed on startup.
• CurseForge installs now keep API-accessible files and open the manual-file
  checklist when a pack contains mods that block third-party downloads,
  instead of cancelling the entire installation. Manual files can now be
  imported as either JARs or ZIPs and are checked against CurseForge's SHA-1
  or MD5 metadata before being copied into the instance. Mods, resource packs,
  shaders, and Paxi data packs are routed to their correct runtime directories
  from the CurseForge project class.