Implement get_app_token and other fixes

[nab138]

Changes in icloud_auth

• Updated dependencies
• Completed implementation of get_app_token
• Added send_request method to send and receive plist data in authenticated request with the proper headers
• Allows appleid or 2fa closure to fail gracefully (e.g. user cancels login)

Changes in omnisette

• Updated dependencies

[polymo1]

Given the size of this PR, I feel it needs a description. Could you provide that?

[polymo1]

Additionally, one of the dependencies you've added fails to build in CI.

[nab138]

I wrote up a quick description, I worked on the sporadically several months ago so it's possible I missed something but I tried to be thorough. As for the dependency, I could enable the vendored feature by default, enable the vendored feature in ci specifically, or install botan in the action before attempting to build. I'm fairly new to this kind of stuff so I'm not sure what the "standard" thing to do here would be.

[nab138]

Honestly most of the changes came from my formatter, the pr is a lot smaller than it seems

[nab138]

I've removed the dependency on botan so CI should work. Some other dependencies have also been updated.