chore: Add button-as-link example

[AlexMunoz]

Hello @diegohaz
I want to contribute to Ariakit, so i made this simple example.

Example button as a link #939

Screenshots

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🔍 Inspect: https://vercel.com/ariakit/ariakit/Aj1p6GxqyxPyixpPLyTWP54AUytx
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🔍 Inspect: https://vercel.com/ariakit/reakit/3kJJaWyaXt966ZmiBfshFqp6cbYp
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[diegohaz]

Thank you @AlexMunoz! This looks good, just made a suggestion.

I'll take a look at the build errors. It's not your fault.

[ariakit-bot]

Thanks a lot for contributing!

Based on our community guidelines, every person who has a PR of any kind merged is offered an invitation to the Reakit organization.

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If you have any questions, let me know!