feat: PPT-767 File Upload controller

[naqvis]

No description provided.

[github-actions]

Hey, your PR is titled Ppt 767 file upload models.
This is not a valid conventional commit.
Since we use well-formed PR titles for our changelogs, not fixing this can introduce problems :'(

[stakach]

We need a controller for managing the various buckets and a few other changes I've made comments for.
Looking great so far!

[stakach]

Just the one minor change, also could you generate an updated open api docs

[stakach]

@naqvis we actually need to be able to whitelist certain file types in the uploads.

Could we, as part of the storage model, add an optional array of file extensions types that we support?
Then on the upload controller check that the filename has a matching extension type

Probably worth doing the same with Mime Types so we can filter on either or both.