Add AltSource format for KSign (URL Scheme that add iPA repositories)

[Astear17]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
Add AltSource repositories to the App Store section by URL Scheme
(Ex: ksign://source?url=https://astear17.github.io/iDevicePatcher/repo.json

Describe alternatives you've considered
AltStore, ESign, SideStore?