feat(editor): append note to page button (#9762)

Close [BS-2310](https://linear.app/affine-design/issue/BS-2310/note-display-in-page-%E7%9A%84%E8%A1%8C%E4%B8%BA), [BS-2312](https://linear.app/affine-design/issue/BS-2312/edgeless-note-%E7%9A%84-element-toolbar-%E6%B7%BB%E5%8A%A0display-in-page%E6%8C%89%E9%92%AE) and [BS-2313](https://linear.app/affine-design/issue/BS-2313/添加display-in-page的toast提示，以及打开toc的按钮)

tests/kit/src/utils/keyboard.ts

@@ -70,6 +70,12 @@ export async function selectAllByKeyboard(page: Page) {
   await keyUpCtrlOrMeta(page);
 }
 
+export async function undoByKeyboard(page: Page) {
+  await keyDownCtrlOrMeta(page);
+  await page.keyboard.press('z', { delay: 50 });
+  await keyUpCtrlOrMeta(page);
+}
+
 export async function writeTextToClipboard(page: Page, text: string) {
   // paste the url
   await page.evaluate(