Define auto label option

Author: kimkim0814

src/client/index.tsx

@@ -1,6 +1,9 @@
 import { createRoot } from "react-dom/client";
 import { App } from "./components/App";
 
+// Add this line to enable Emotion auto label
+globalThis.EMOTION_RUNTIME_AUTO_LABEL = true;
+
 const container = document.getElementById("app");
 if (!container) {
   throw new Error("`#app` is not found");

src/types/global.d.ts

@@ -0,0 +1,6 @@
+declare global {
+  // eslint-disable-next-line no-var
+  var EMOTION_RUNTIME_AUTO_LABEL: boolean;
+}
+
+export {};