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
@tstrachota, @mbacovsky, why change this code? If `params[:location_id]` is `nil`, then  `Location.find_by_id(nil)` will return `nil`?