Support Auth emulator options

[charlesfries]

This PR updates the Auth emulator initializer to the modular format, and also allows Auth emulator options to be passed in via the config. Currently, the only option available is disableWarnings.

[mikkopaderes]

Thanks for this. I will check it out manually first if there's any compatibility issues with modular SDK and compat SDK for this API particularly in FastBoot env.

[mikkopaderes]

Just as what my hunch expected, this change wouldn't work in FastBoot environment. Detailed explanation on it in embroider-build/ember-auto-import#446.

I haven't decided yet on what would be the best way to approach this. But if we move now, one option I think is to update the firebase-service to use the modular SDK.

Another approach is to emulate how angularfire does their importing. If you read through their examples, it seems that they import Firestore APIs from under a custom module @anguar/fire/firestore. We could probably do the same and that the export of those module would return the appropriate browser or node based modules depending on the environment. I'm not yet sure how flexible it is though because we'll always have to add a new export for new APIs that they have which can be a maintenance burden.

Regardless of the approach, this will probably lead to a chain reaction of needing to update multiple parts of the code with modular SDK as well. In short, I think this PR is too early for now to make as there's some dependencies that needs to be resolved first.

[charlesfries]

@mikkopaderes Any new thoughts here? It seems auth.useEmulator() still doesn't accept a config object, but I'm curious if anything has changed elsewhere in this addon that would now facilitate an easy migration to the modular API.

[mikkopaderes]

@charlesfries not really. My plan was to remove non-modular API as soon as Firebase release v10. I think they do yearly major version bump so v10 I assume should be nearby. But something I could take a step ahead and look through over the weekend in prep for the release, I guess.