Provide better docs or a better tooling on how you can print when an internal error occurs

## Description
Sometimes you get errors like this:
```
[firebase_auth/internal-error] An internal error has occurred, print and inspect the error details for more information.
```

It would be helpful that the FlutterFire packages provide a more help on how to print the these details. Because the only I'm seeing is this error message. Like a link to the docs or a short explanation would be nice.