🚫 Allow Banning Users and Guests

[rapterjet2004]

• fixes #3898

Screenshots

ToDo

• [x] Add Capabilities and Moderator Check
• [x] Model
  • [x] Api See overview routes
• [x] ViewModel
• [x] View
  • [x] Ban button - for each participant in list. Show dialog for an internal Note.
  • [x] "List Bans" Button should trigger a scrollable full screen dialog showing all the Bans. Display Internal Note if needed.
    • [x] XML
    • [x] Fragment class
    • [x] Unban button, should be present as an option on every list item (Need to check if successful)
• [x] The UI is atrocious, need to make it look good
• [ ] Need to implement it with Guests too

Bugs

• [x] Drop down color needs to be constantly, nc_grey

🏁 Checklist

• [ ] ⛑️ Tests (unit and/or integration) are included or not needed
• [ ] 🔖 Capability is checked or not needed
• [ ] 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• [ ] 📅 Milestone is set
• [x] 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)