Direct Messaging (DMs)

[tomlin7]

Implement a DM system between users, separate from bunch/channel messages.

• DM models (maybe something like DirectMessage, DirectConversation, etc.)
• Endpoints for sending, listing, and deleting DMs
• Permissions
• Tests

[CasRepoClone]

https://websockets.readthedocs.io/en/stable/howto/django.html

[tomlin7]

@CasRepoClone, that's very thoughtful, but we already have WebSockets set up for channel messaging, and this issue concerns direct messaging (DMs) between users.