Messenger example - register, confirm, and unregister user facts

• Load user facts from client and update DB contact
• Register and confirm email fact
• Unregister email fact
• Register and confirm phone fact
• Unregister phone fact

Examples/xx-messenger/Tests/AppFeatureTests/AppFeatureTests.swift

 import ComposableArchitecture
+import CustomDump
 import HomeFeature
 import RestoreFeature
 import WelcomeFeature