Changes to Return the timekeepers on a rate table

removed the optional property data/items/allOf[subschema #2]/timekeeper from the response with the 200 status

added the new optional query request parameter include_groups

added the optional property data/items/allOf[#/components/schemas/RateTableTimekeeper_base]/timekeeper to the response with the 200 status

added the optional property data/items/allOf[#/components/schemas/RateTableTimekeeper_base]/type to the response with the 200 status

endpoint added