Fixes #5088 #2524 - adding taxonomy related parameters to apidocs

- new param group `taxonomy` for taxable resources
- new param group `taxonomy_scope` for index actions of taxable resources
- pagination and search param moved to a group `search_and_pagination` to reduce duplicities
@isratrade  as I wrote in previous comment, When running the tests: Location.find_by_id(nil) raises exception instead of returning nil. I failed to find the cause yet. Any idea why it may be?