Moderation tools and Admin API

[bitfl0wer]

In my opinion, a chat service can only be released for public use if there are adequate moderation tools for instance moderators and admins to use. The Polyphony Server should come with the tools necessary to handle the day-to-day business on an instance with a lot (say thousands, if not more) users and protect instances from abuse

Thinking about the actions listed at https://docs.joinmastodon.org/admin/moderation/ might be a good start, although things like user storage limits and manual account approval already come to mind for features not found on the linked website.

• User Whitelisting #45

[erkinalp]

Server-wide permissions, similar to spacebar's user rights might be useful.