📚 File versions

[kulmann]

Several planned improvements revolving around the file versions topic.

Retention, cleanup & storage of versions

• 🧹 Clean-Up File Versions opencloud#1419
• [FR] Add option to manage limits on versioning or integrate snapshots opencloud#2419
• [FR] Ability to expose file revisions from ZFS/BTRFS snapshots/rsnapshot backups instead of OC managing its own file duplicates opencloud#1702

Previewing & restoring versions in the UI

• Versions Preview: Open file revisions read only web#382 and Make versions available via PROPFIND requests opencloud#662
• Showing which user created a file version web#1963 and Make version creator available via PROPFIND requests opencloud#2456

How new versions are created (upload / replace UX)

• Improve Buttonaction "Replace" and "Skip" for files web#269