Approval Process (real)

[rithik-b]

There is a lot to figure out here (like #6) so haven't added any schema changes for this yet. First step is modelling out how to handle approval for edits vs new mod versions vs mod versions for new game versions and a simple ux flow for all this too.

[rithik-b]

Rough schema:

The existing tables for mods, mod_versions, etc would have a corresponding table for pending changes. Creating a mod would instantly add it to the mods table and any subsequent metadata edits (minus contributors) will be put in the mods_pending table. For new versions, they get put into the mod_versions_pending table first (and any subsequent edits there too). On approval they get moved to the real table.