feat: Commit messages from topic with transaction

[rekby]

Feature Request

YDB supports transactions between tables and topics. It allow to commit messages to a topic with common transaction commit (with table changes and topic writes).

• [x] Initial commit
• [x] Traces
• [x] Integration tests
• [x] Code examples
• [ ] Positive tests
• [ ] Negative tests
• [ ] Optimizations for batch many reads in one commit call
• [ ] Reconnect reader on failed commit