feat(mobile): mobile toc menu (#9582)

Close [BS-1787](https://linear.app/affine-design/issue/BS-1787/toc-移动端适配)

packages/frontend/i18n/src/i18n.gen.ts

@@ -2079,6 +2079,10 @@ export function useAFFiNEI18N(): {
       * `View table of contents`
       */
     ["com.affine.header.option.view-toc"](): string;
+    /**
+      * `Table of contents`
+      */
+    ["com.affine.header.menu.toc"](): string;
     /**
       * `Contact us`
       */

packages/frontend/i18n/src/resources/en.json

@@ -519,6 +519,7 @@
   "com.affine.header.option.open-in-desktop": "Open in desktop app",
   "com.affine.header.option.view-frame": "View all frames",
   "com.affine.header.option.view-toc": "View table of contents",
+  "com.affine.header.menu.toc": "Table of contents",
   "com.affine.helpIsland.contactUs": "Contact us",
   "com.affine.helpIsland.gettingStarted": "Getting started",
   "com.affine.helpIsland.helpAndFeedback": "Help and feedback",