docs(auth): Link Multiple Auth Providers to a Firebase Account

[Milutin-P]

Description

In the latest PR#7443 I noticed that we deleted a section in the docs. So, I've rewritten and returned that deleted section. I've also added quote from the docs for people to understand when they need to use it.

Release Summary

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• This is a breaking change;
  • No

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Name	Status	Preview	Comments	Updated (UTC)
react-native-firebase	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 28, 2023 5:51pm
react-native-firebase-next	❌ Failed (Inspect)			Nov 28, 2023 5:51pm

[mikehardy]

Nice! Thanks so much. Our linters and formatters always have a lot to say about big blobs of documentation but that's trivial for me to shepherd through to merge once the text actually exists (as it does now...)

So I'll fix any little spelling or linter stuff and get this in

[mikehardy]

Ah - except it looks like you've already done so 😆 . Most excellent

[Milutin-P]

Ah - except it looks like you've already done so 😆 . Most excellent

I have reviewed several pull requests that you have approved. By doing that, I've identified specific details on which you focus on and commonly fix in all of them.

Thank you again for your dedication to this project!