MONGOID-5111 [Documentation Only] Add docs for limit/skip/batch_size (#5033)
MONGOID-5111 [Documentation Only] Add docs for limit/skip/batch_size (#5033)

* Fixes MONGOID-5111.
- Documents limit, skip, and batch_size operators
- Add warning to Queries + Persistence section about limit, etc being ignored.

* minor fixes

* Update queries.txt

* Fix anchor for batch-size

Co-authored-by: shields <d20b7e8dbdb0afa35105339af03062ec55adc574@tablecheck.com>
Co-authored-by: Oleg Pudeyev <e6fb06210fafc02fd7479ddbed2d042cc3a5155e@olegp.name>
mongodb/mongoid,mongodb/mongoid,mongodb/mongoid