Improve accessibility

[SuperMeepBoy]

A new MR to add a few accessibility improvements.

I'm doing this step by step so sorry if it is not okay to you for me to deliver many pull requests, tell me, I'll adapt !

I push this one because there are a few minor changes which would be greatly appreciable for keyboard navigation :

• Triggering the fav button would both add to favorite and play the sound, it is now fixed with this MR
• We can now use Spacebar to trigger buttons as well as Enter which is a common practice
• Items menu can be opened with keyboard
• Modals will be in a FocusTrap so navigating with keyboard won't select items in the background (you may want to check if it is okay to add a dependency to focus-trap-react for you)
• Textarea will be autofocused, it is sometimes a bad practice but in this case it is okay from what I understood
• Modals can be closed with Escape key

[remvze]

Thank you once again for your contribution. I greatly appreciate it. Unfortunately, this PR conflicts with the develop branch since I've also been working on improving accessibility. The following features have already been implemented in that branch:

• Modals have a focus trap (using the same package you used) and an escape shortcut.
• The items menu has a shortcut, including its items.
• The menu has been reimplemented using Radix Primitives to improve its accessibility, so it now has keyboard navigation.

However, the other features you've added (the favorite button fix and textarea autofocus) are great, so I would appreciate it if you could pull from the main branch (I'll merge the develop branch into it right now) and then add those features and make a new PR.

You can check the develop preview here if you want.

[SuperMeepBoy]

Alright ! Closing merge request. I will only push the fix (which involves a refacto too for cleaner code) because for some reasons I can't get to make the autofocus work on textarea anymore and I don't have time to check that tonight !