feat(Auth): Add Account Management Features

[jteplitz]

For password auth firebase exposes a number of methods for account management (creation, changing email, setting security rules, etc...). We should expose a way to access those (or decide if we just want to let people use the SDK instead)

[davideast]

This is a great idea, but let's table it for now and focus on the shipping this puppy, so closing for now.

[Splaktar]

This would indeed be nice to have.