Allow whereIn to retrieve more than 10 documents

[stargazing-dino]

Hi!

I have read a fair amount of SO posts before opening this issue and have gotten the impression that the SDK authors do not want to allow more than ten documents in a whereIn as it would slow things down and not scale to possibly thousands of documents. On the other hand (again just my impression) I gathered that the community thinks this filter is fairly useless as it is with that hard set limit and many find possibly weirder methods to achieve the same thing.

I don't want to argue for and against as I think that's up to the authors but I'd like to have it mentioned here as I didn't find anything in past issues. Personally I'd like to see more than 10 possible as I think it'd be best to give the developer the freedom of choice and just leave a caution note to the side of potential performance hits.

Some related posts:
https://stackoverflow.com/a/48423626/8213910
https://stackoverflow.com/a/60744796/8213910
https://stackoverflow.com/a/61292253/8213910
https://stackoverflow.com/questions/64327490/flutter-firebase-retrieve-a-list-of-documents-limited-to-ids-in-an-array