Add ignoreRepeat option to skip callback on held keys

[nikoewe]

Summary

• Adds a new ignoreRepeat option to Options that prevents the hotkey callback from firing repeatedly when a key is held down
• Uses the native KeyboardEvent.repeat property to detect held keys and early-returns from the listener when ignoreRepeat is enabled

Usage

useHotkeys('a', () => {
  console.log('fires only once per key press')
}, { ignoreRepeat: true })

Test plan

• Verify that with ignoreRepeat: true, holding a key only fires the callback once
• Verify that without the option (or ignoreRepeat: false), the default repeat behavior is unchanged
• Verify the option works alongside other options like keyup, keydown, and preventDefault

[vercel]

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[JohannesKlauss]

Please add tests to this PR.

[nikoewe]

@JohannesKlauss Updated the tests!