feat: global shortcut support (#39604)

* Fix #5796

Global shortcuts can be easily introduced by adding "data-shortcut-keys"
to the elements

---------

Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/js/features/repo-issue-edit.test.ts

@@ -0,0 +1,43 @@
+import {tryShortcutQuoteReply} from './repo-issue-edit.ts';
+
+test('tryShortcutQuoteReply', () => {
+  const container = document.createElement('div');
+  container.innerHTML = `
+    <div class="comment-container">
+      <button class="quote-reply">Quote reply</button>
+      <div class="render-content markup">Comment text</div>
+      <div class="raw-content">Raw text</div>
+    </div>
+  `;
+  document.body.append(container);
+  const selection = window.getSelection()!;
+  onTestFinished(() => {
+    selection.removeAllRanges();
+    container.remove();
+  });
+  const button = container.querySelector('button')!;
+  const onClick = vi.fn();
+  button.addEventListener('click', onClick);
+
+  selection.removeAllRanges();
+  expect(tryShortcutQuoteReply()).toBe(false);
+
+  selection.selectAllChildren(container.querySelector('.raw-content')!);
+  expect(tryShortcutQuoteReply()).toBe(false);
+
+  const range = document.createRange();
+  range.selectNodeContents(container.querySelector('.render-content')!.firstChild!);
+  selection.removeAllRanges();
+  selection.addRange(range);
+  selection.collapseToStart();
+  expect(tryShortcutQuoteReply()).toBe(false);
+  expect(onClick).not.toHaveBeenCalled();
+
+  selection.removeAllRanges();
+  selection.addRange(range);
+  expect(tryShortcutQuoteReply()).toBe(true);
+  expect(onClick).toHaveBeenCalledTimes(1);
+
+  button.remove();
+  expect(tryShortcutQuoteReply()).toBe(false);
+});