In-Game mail does not work

[Blackburn29]

All of the in-game mail packets are currently not supported. Need to add in the functionality and create a backfill command to migrate the existing mails from the old database

[Zero1UP]

Sending in game mail is functional as of
a8673a1

[Blackburn29]

Reading mail and unreads working as of 0c8a6a8

TODO:

• Unread counts
• Guild mail

[Blackburn29]

Read counts implemented in e6c3344

TODO:

• Guild mail