feat: Use /sources/stats in the home (#133)

## Types of changes

- [x] I have read the **CONTRIBUTING** document.
- [x] My code follows the code style of this project.
- [ ] I have updated the documentation accordingly.
- [x] I have added tests to cover my changes.
- [x] All new and existing tests passed.
- [x] This is **NOT** translation related.

This is implements feature #131 and it will allow implementing #132
With this, public mode functions perfectly and also has source filtering.

Co-authored-by: davidoskky <davidoskky@yahoo.it>
Reviewed-on: https://gitea.amine-louveau.fr/Louvorg/ReaderForSelfoss-multiplatform/pulls/133
Co-authored-by: davidoskky <davidoskky@hidden.hidden>
Co-committed-by: davidoskky <davidoskky@hidden.hidden>
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