Create Forum category for ID requests

[bouteloua]

@kiwifergus

If 3 of those observations had been set as “featured” or priority by other iNatters, then those 3 would be put to the top of that list, and they would be the first ones I review.
…
I’m going to write this up as a formal feature request!

But is it all that different than the existing one @jdmore linked to earlier? https://forum.inaturalist.org/t/re-implement-limited-id-please-flags-for-observations/2548