add global state

store/index.ts

@@ -0,0 +1,16 @@
+import { create } from 'zustand';
+
+interface MainStore {
+  modelLoading: boolean;
+  toggleLoading: (loaded: boolean) => void;
+}
+
+const useMainStore = create<MainStore>()((set) => ({
+  modelLoading: true,
+  toggleLoading: (loaded) =>
+    set(() => ({
+      modelLoading: loaded,
+    })),
+}));
+
+export default useMainStore;