**Describe the solution you'd like** Add [snapshots](https://github.com/OWASP/Nest/blob/main/backend/apps/owasp/models/snapshot.py) to sitemap (similar to what we already have [here](https://github.com/OWASP/Nest/tree/main/backend/apps/sitemap/views)) **Are you going to work on implementing this?** - [ ] Yes - [x] No
