Identify unused kafka topics

# What is currently missing?

Identifying unused kafka topics and inform admins

# How could this be improved?

Unused kafka topics can be derived by reading the timestamp of log files from AdminClient may be in recent versions

Or deploy a script on broker which exports timestamps of log files and push that data to a topic.
Then read that topic data and see if they are unused for a period of time
Ex: if unused for 90 days, mark for deletion

# Is this a feature you would work on yourself?

* [ ] I plan to open a pull request for this feature