[Messenger example] group chat

xx-messenger example

• Display group chat screen
• Send group chat messages
• Receive group chat messages
• Group chat messages UI

assigned to @darrarski.xx

added 2 commits

• 4e501f2a - Disable image picker for group chats
• 02f25d6b - Display usernames on chat screen

Compare with previous version

marked the checklist item Group chat messages UI as completed

marked this merge request as ready

requested review from @brunomunizaf

enabled an automatic merge when the pipeline for 02f25d6b succeeds

mentioned in commit 41055d9e

merged