Filter and sort Repos in search

**Is your feature request related to a problem? Please describe.**
N/A
**Describe the solution you'd like**
When you're searching for apps, being able to filter (Only search Fdroid official and Microg, not IzzyOnDroid), and also being able to sort (Shows Fdroid official first, IzzyOnDroid second, Microg last).

**Describe alternatives you've considered**
Selected apps being checked from selected Repos (E.g com.google.gms being checked/updated from Microg repo only)

**Additional context**
N/A, but can explain more.