[FEAT] Channel archive cog

[tigattack]

Overview

Cog to handle the (currently manual) channel archival process.

Commands

[p]archive [channel=] [days=30]
/archive [channel=] [days=30]

DoD

• When [p]archive is used, the bot should:
  • Confirm archival of specified channel
  • Post 🔒 in the targeted channel
  • Disallow all non-mods from sending messages
• After <days> since archive, the channel should be deleted
• days arg should default to 180 (open to discussion)
• Will need options to set:
  • default days
  • roles to allow/disallow post-archival? or just use bot's mod roles? TBD.