Add GTFS station JSON data

public/data/stations/87698423.json

@@ -0,0 +1 @@
+{"departs":[],"arrivees":[{"trip_id":"OCESN34070R1187_R:CTE:FR:Line::b1e7c34d-e7c3-4390-9a23-d7f42145f42d::87746479:87698423:6:2202:20261206","num":"34070","type":"TER","arr":"22:02","orig":"Saint-Gervais-les-Bains-Le Fayet","dest":"Chambery-Jacob-Bellecombette","days":[0],"start":"20260830","end":"20261206","dates":["20260830","20260906","20260913","20260920","20260927","20261004","20261011","20261018","20261025","20261101","20261108","20261115","20261122","20261129","20261206"],"stops":[]}]}