[FIX] modified values for the frontend to be able to make the request (capitalCode, metroCode and modalityShift)

[FIX] Subroute '/new_pnad_state changed to '/state', '/reg_code' to '/region' and '/age_range' to '/age_range_all'

[ADD] filters 'attendModality, attendsSchool, capitalCode, ethnicGroupNewPnad, metroCode and regionCode' added to convert files and id2str