add github action for stale discussions in the question and answer section

**Is your feature request related to a problem? Please describe.**
It would be nice to get this process automated.

**Describe the solution you'd like**
Label discussions as stale and then close them after some time has passed

**Describe alternatives you've considered**
Manual can work, but its nicer to have an automated policy

**Additional context**

- https://github.com/orgs/community/discussions/70478