Refactor test suite (#110)

* Chore: refactor test suite

* Chore: move rate limiting tests out to new module

* Manager.t: use [`setup_endpoints`] method encapsulated in library

* Chore: abstract set limits to separate function

* fix: fix conflicts with base branch

---------

Co-authored-by: Rahul Maganti <rahulmaganti@rahuls-mbp.mynetworksettings.com>

Author: RahulMaganti47