fix(hotkeys): add ? to supported punctuation keys

[MohammedALjaberi]

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

Fixes #19

🎯 Changes

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm run test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

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@tanstack/hotkeys

npm i https://pkg.pr.new/TanStack/hotkeys/@tanstack/hotkeys@30

@tanstack/hotkeys-devtools

npm i https://pkg.pr.new/TanStack/hotkeys/@tanstack/hotkeys-devtools@30

@tanstack/react-hotkeys

npm i https://pkg.pr.new/TanStack/hotkeys/@tanstack/react-hotkeys@30

@tanstack/react-hotkeys-devtools

npm i https://pkg.pr.new/TanStack/hotkeys/@tanstack/react-hotkeys-devtools@30

@tanstack/solid-hotkeys

npm i https://pkg.pr.new/TanStack/hotkeys/@tanstack/solid-hotkeys@30

@tanstack/solid-hotkeys-devtools

npm i https://pkg.pr.new/TanStack/hotkeys/@tanstack/solid-hotkeys-devtools@30

commit: 08205b0