feat: implement skipNativeAuth config option

[robingenz]

Is your feature request related to a problem? Please describe:

It is currently not possible to use the Firebase JS SDK to sign in to Apple. (see #41 (comment)).
One the one hand, for apple.com, the rawNonce (see here) must also be passed when signing in.
On the other hand, this rawNonce can only be used once.
A parallel login on native level and web level is therefore not possible.

Describe the solution you'd like:

Add a configuration option to skip authentication at the native layer (See #47 for more information).

{
  "plugins": {
    "FirebaseAuthentication": {
      "skipNativeAuth": false
    }
  }
}

Default value: false

Describe alternatives you've considered:

Currently, I am not aware of any alternative options. Any ideas are welcome.

Additional context: