add Railway config as code schema to the catalog (#4414)

Author: jaredLunde

src/api/json/catalog.json

@@ -4456,6 +4456,12 @@
       ],
       "url": "https://www.qgoda.net/schemas/qgoda.json"
     },
+    {
+      "name": "Railway",
+      "description": "Use Railway config as code to define settings for building and deploying your services",
+      "fileMatch": ["railway.toml", "railway.json"],
+      "url": "https://railway.com/railway.schema.json"
+    },
     {
       "name": "Rattler-build",
       "description": "Rattler-build recipe",