refactor(auth): use Jetpack's Navigation Component (#1265)

* refactor(auth): delete email/password snippets

* refactor(auth): delete facebook login snippets

* refactor(auth): delete google signin snippets

* refactor(auth): delete anonymous auth snippets

* refactor(auth): delete custom auth snippets

* refactor(auth): delete phone auth snippets

* refactor(auth): delete mfa snippets

* create BaseFragment and AnonymousAuthFragment

create ChooserFragment

create CustomAuthFragment

create EmailPasswordFragment

create FacebookLoginFragment

create FirebaseUIFragment

create GenericIdpFragment

create GoogleSignInFragment

create PasswordlessFragment

create PhoneAuthFragment

create MFA Fragments

* test: delete all test files :/

* feat: add navigation library and create java nav graph

* fix the mfa navigation in java

* create the nav graph for kotlin

* address review comments

* remove trailing commas that were causing a build error

Author: thatfiredev

auth/app/build.gradle

@@ -41,6 +41,8 @@ dependencies {
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
     implementation 'androidx.vectordrawable:vectordrawable-animated:1.1.0'
     implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.4'
+    implementation 'androidx.navigation:navigation-ui-ktx:2.3.4'
 
     // Import the Firebase BoM (see: https://firebase.google.com/docs/android/learn-more#bom)
     // Temporarily pinning versions due to Kotlin bug (see below)