[FEAT] Logging cog

[issy]

Overview

It'd be really useful to have a dedicated cog for logging, as our current logs from Dyno miss a lot. While we're at it we can also include some extra features that Dyno is lacking

Commands

TBD

DoD

Bot must be able to log the following

• message edit
• message deletion (must be able to show media in log)
• member nickname change
• member roles update

Stretch

• log command errors
• ability to send logs to graylog and/or a time series database such as InfluxDB or Prometheus

[issy]

Discussion welcome on any other features you think should/shouldn't be included, as well as suggestions for command syntax

[tigattack]

For command syntax I suggest something like
Base: [p]logger
Events: [p]logger event [enable|disable]
Example of events: msgedit, msgdel, nickchange, rolemembership?

Other:

[p]logger [enable|disable]
[p]logger logchannel <channel>

Other optional:

[p]logger <channel> <event> [enable|disable]

I'm sure we could continue to expand this further if necessary, but this seems like a good base at least.

One further thought I have is it may not be worth building in the functionality to track message edits. We've never used this due to the sheer level of spam it causes in the log channel, to the point where it's not even really that useful.