add meta

Runtime/editor/window_config.cs.meta

+fileFormatVersion: 2
+guid: b07028e6b697b43e4a5911da0ab9ca54
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: