New CommunitiesBot demonstrating the 36.0.0 communities API:
- onCommunityChatAdded / onCommunityChatRemoved triggers for the
community_chat_added / community_chat_removed service events
- reading the Community (id/name) from CommunityChatAdded
- ExtendedChat.community (ChatFullInfo.community) via getChat
- waitCommunityChatAdded expectation
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
