feat: url scheme paths

[castdrian]

It'd be great if we'd had a couple of paths for the url scheme to call:

feather://repository?q=https://repo.json
feather://install?q=https://file.ipa

[CLARATION]

https://github.com/khcrysalis/Feather/blob/main/iOS/Delegates/AppDelegate.swift#L71-L95

feather://source/https://raw.githubusercontent.com/bunny-mod/BunnyTweak/refs/heads/main/app-repo.json

There's already one for repositories, for ipas I thought importing to the app with the sharesheet or through download page would be enough.

[castdrian]

lovely, very nice example url you used as well 🥹
the install one was just something that came to mind for like on-demand testing, guess I kinda got entraced by trollstore lite there