Add custom sorting

### Describe the feature

Repositories are now sorted by number of PRs, we can add a dropdown to add some more custom sorting

### It should be implemented because

_No response_

### Did you think about any alternative?

_No response_

### Additional context

_No response_

### Extra fields

- [X] I have used the search function to check if an issue already exists
- [ ] I'd like to work on this issue