[EPIC] Implement Topic operations in client-python

### Describe the proposal

* Currently client-python only supports `Fileset` catalog, we should also support `Topic` catalog which supported in Java client.
* Current Java class diagram of Topic, Python implementation will follow this diagram

### Task list

- [ ] Implement interface `topic` and data-transfer-object `topic_dto`
- [ ] Implement Response object `topic_response`
- [ ] Implement `topic_change`
- [ ] Implement Request objects `topic_create_request`, `topic_update_request`, `topic_updates_request`
- [ ] Implement `data_layout`, `topic_catalog` and its implementation `message_catalog`
- [ ] add `Topic` catalog type in `dto_converters.py`

Use the Java Topic class diagram and the existing Fileset catalog support in client-python as references. Work through the listed interfaces, DTOs, responses, changes, requests, catalog classes, and dto_converters.py entry, then verify completion against every task-list item and the corresponding client behavior.

Written by the indexing model from the issue text.