Add LangGraph Configuration JSON Schema (#4845)

Author: hinthornw

src/api/json/catalog.json

@@ -7724,6 +7724,17 @@
       "fileMatch": ["language-configuration.json"],
       "url": "https://www.schemastore.org/language-configuration.json"
     },
+    {
+      "name": "LangGraph Platform configuration",
+      "description": "LangGraph Platform configuration file",
+      "fileMatch": [
+        "langgraph.json",
+        "langgraph.*.json",
+        ".langgraph.json",
+        ".langgraph.*.json"
+      ],
+      "url": "https://raw.githubusercontent.com/langchain-ai/langgraph/main/libs/cli/schemas/version.schema.json"
+    },
     {
       "name": "Any",
       "description": "Valid for any JSON file",