Changes to List PFS Designs

added the new optional query request parameter date_from

added the new optional query request parameter date_to

added the new optional query request parameter zenith_dec

added the new optional query request parameter zenith_ra

added the new enum value altitude to the query request parameter sort_by

the response's body type changed from array to object for status 200

added the new optional query request parameter limit

added the new optional query request parameter offset

added the new optional query request parameter search

added the new optional query request parameter sort_by

added the new optional query request parameter sort_order

added the non-success response with the status 422

added the required property items to the response with the 200 status

added the required property limit to the response with the 200 status

added the required property offset to the response with the 200 status

added the required property total to the response with the 200 status

endpoint added