#27 [ENH] Display name checks

One scam tactic is changing your display name to something like “Community-Info” to appear like an official communication. Check display names on join and on change for certain patterns. We currently do username checks but not display names.

Example, see https://discord.com/channels/405011810937339905/494188859228422146/1522168724138885251 by a user named “#🗞️|Community-info”

Initial patterns (WIP):

• Community (seen in wild)
• Announcement (seen in wild)
• Support
• Official
• Felicia Day