list_crossings
Search level crossings
Search UK level crossings by name, URL word or region name (substring, case-insensitive). Returns one line per match — name, crossing type, region, and a status URL ending .md that returns that crossing's live markdown status. Reports the total match count and returns the first `limit`; there is no pagination, so narrow the query to see different matches. Names starting with the query sort first.
limitquery必填