chore: convert everything to vue sfc

packages/search-site/src/lib/emitter.mjs

@@ -0,0 +1,5 @@
+import mitt from 'mitt';
+
+const emitter = mitt();
+
+export default emitter;

packages/search-site/src/lib/store.mjs

@@ -0,0 +1,17 @@
+/* eslint-env browser */
+
+const storage = (() => {
+  // return localstorage in the browser env
+  if (this && this.localStorage) return this.localStorage;
+
+  // return a mock localstorage in the server env
+  return {
+    getItem: () => null,
+    setItem: () => null,
+  };
+})();
+
+export default {
+  get: id => JSON.parse(storage.getItem(id)),
+  set: (id, val) => storage.setItem(id, JSON.stringify(val)),
+};