feat: improve keyboard navigation

[arthurdenner]

Hi! 👋🏽

The current implementation, using divs, prevents better keyboard navigation - we can't tab through the list of compositions or interact with the buttons without using the arrow keys.

This PR improves keyboard navigation by using button tags were applicable and adding the href attribute to the a tags of compositions.

While implementing these changes, I wondered if it'd interesting to try and add react-router-dom or something similar to implement actual navigation in React.

[Iamshankhadeep]

I must say this is a nice feature improvement. Let @JonnyBurger review it. Thanks for the PR.

[JonnyBurger]

Wow this works really well! Thanks a lot for this quality PR! 💙
I'll make sure to shout you out in the next blog post.
And also I'll probably use it as a reference when I struggle in the future with adding keyboard controls 😁

[arthurdenner]

Thank you for this awesome project and kind words!