Add an interactive method for right-swiping to pop up the TOC to the reader page.

stores/useDrawerTOCState.ts

@@ -0,0 +1,16 @@
+import { create } from "zustand";
+
+type State = {
+  isOpen: boolean;
+};
+
+type Action = {
+  changeDrawerTOCOpen: (open: State["isOpen"]) => void;
+};
+
+const useDrawerTOCState = create<State & Action>((set) => ({
+  isOpen: false,
+  changeDrawerTOCOpen: (open) => set({ isOpen: open }),
+}));
+
+export default useDrawerTOCState;