Add JSON schema for manifest.json (#128560)

.devcontainer/devcontainer.json

@@ -58,7 +58,13 @@
         ],
         "[python]": {
           "editor.defaultFormatter": "charliermarsh.ruff"
-        }
+        },
+        "json.schemas": [
+          {
+            "fileMatch": ["homeassistant/components/*/manifest.json"],
+            "url": "./script/json_schemas/manifest_schema.json"
+          }
+        ]
       }
     }
   }