DM members who receive a ⚠️ warning from moderators

[vcarl]

The ⚠️ reaction can only be triggered by moderators. Currently it updates #mod-log with a copy of the message, but it should also DM the member who sent the message. I'm imagining something like

You've received a warning from the moderators on your message in #channel:

message content

link: https://discord.com/channels/xxx/yyy/zzz

In the future, maybe we could expand this to have a "discussion channel" for the user to privately discuss the situation with all mods.