fix(editor): improve pdf embed viewer UX (#11641)

Closes: [BS-3101](https://linear.app/affine-design/issue/BS-3101/pdf-embed-模式的选中框选-和点开看详情有比较大的问题)

### What's Changed!

* Fixed disable pointer event in native pdf viewer by dragging
* Disable opening peek view with pdf viewer in readonly and sharing modes

tests/kit/src/utils/attachment.ts

@@ -0,0 +1,21 @@
+import type { Page } from '@playwright/test';
+
+import { Path } from '../playwright';
+
+const fixturesDir = Path.dir(import.meta.url).join('../../../fixtures');
+
+export async function importAttachment(page: Page, file: string) {
+  await page.evaluate(() => {
+    // Force fallback to input[type=file] in tests
+    // See https://github.com/microsoft/playwright/issues/8850
+    window.showOpenFilePicker = undefined;
+  });
+
+  const fileChooser = page.waitForEvent('filechooser');
+
+  // open slash menu
+  await page.keyboard.type('/attachment', { delay: 50 });
+  await page.keyboard.press('Enter');
+
+  await (await fileChooser).setFiles(fixturesDir.join(file).value);
+}