Moderation Feature: View Mute Duration and Time Remaining

[Exper1mental]

The title says it all. Infractions should list mute duration and time remaining (if applicable).

It would also be nice if users could check how long they have remaining on their mute, maybe through ClemBot's dashboard.

[Jay-Madden]

Covered by timeout addition in #539

[Jay-Madden]

tho adding that info to the infraction command could be cool