request: auto-detect and auto-apply manual actions

[kyranet]

Is your feature request related to a problem? Please describe.

When somebody mutes or restricts a user manually, Skyra does not act upon them.

Describe the solution you'd like

The feature can be opt-in or opt-out (needs feedback), and is about detecting when a role that's added or removed is the muted or a restriction role.

• Auto Actions
  When a user is given the Muted role, all other roles must be stripped and the action logged, similar to s!mute.
  When a user's Muted role is removed, all the previous roles must be re-added and the action logged, similar to s!unmute.
• Auto Logging
  When a user is given or gets a restriction role, Skyra should log it accordingly.

Optionally, we can also move events.ban-add and events.ban-remove into a moderation section and give them more helpful names, such as moderation.automatic-ban-log and moderation.automatic-unban-log.

Describe alternatives you've considered

N/a.

Additional context

#179 in #suggestions.