fix(hotkeys): add ? to supported punctuation keys

Adds  to PunctuationKey type and PUNCTUATION_KEYS constant,
enabling  for help shortcuts.

Fixes #19

Author: MohammedALjaberi

.changeset/add-question-mark-key.md

@@ -0,0 +1,5 @@
+---
+'@tanstack/hotkeys': patch
+---
+
+Add `?` to supported punctuation keys for `Mod+?` help shortcut

packages/hotkeys/src/constants.ts

@@ -290,6 +290,7 @@ export const EDITING_KEYS = new Set<EditingKey>([
  */
 export const PUNCTUATION_KEYS = new Set<PunctuationKey>([
   '/',
+  '?',
   '[',
   ']',
   '\\',

packages/hotkeys/src/hotkey.ts

@@ -116,6 +116,7 @@ export type EditingKey =
  */
 export type PunctuationKey =
   | '/'
+  | '?'
   | '['
   | ']'
   | '\\'