feat(playground): share button

[HiDeoo]

This PR continues the work started in #84 (and targets it) about adding a share button to the playground.

Most of the feature was implemented in the previous PR, so this PR mostly builds on top of that. As suggested, the Rust playground was used as a reference for the implementation, where the URL is never updated to avoid a potential confusion for the user having to guess if it's updated live or not or mess with the history.

Here is a summary of some of the changes made in this PR:

• Move the button to the sidebar as the initial position in the tab bar was confusing and not very discoverable.
• The feedback of the copy button after a successful copy was improved to be more visible and accessible.
• An alert bar was implemented to surface various errors to the user, which can optionally be dismissed.
  • An alert is shown when we fail to copy the share link to the clipboard but still provide the link so it can be manually copied
    
  • An alert is shown when we fail to restore the playground state
    
  • I added size limits to both compression and decompression and an alert is shown when a limit is exceeded
    
  • The Sätteri version is now saved in the state and we show an alert when the version of the playground state is different from the current version (fake screenshot where I inverted the condition so version numbers are identical in the message)
    
• When restoring a playground that includes scripts and these scripts are not the default ones, we no longer compile them automatically (as they could do anything) and we show an alert to the user for them to review them and choose to either dismiss or run them.
  

Happy to drop anything that you don't like or want, change anything, add missing things, or drop the PR entirely if you think it's not good.

A few notes:

• I tried to match as much as possible the existing code to minimize the changes (but some parts are meh imo)
• I'm not the best when it comes to UI and colors
• I had formatting issues for TS and CSS files in the website/ directory so I only committed formatted code that I changed and ignored formatting changes for the rest of the code I did not change. I'll investigate that later
• A potential missing feature is schema versioning that I did not add to this PR. I thought it could be done if the schema is ever changed in a breaking way

[Princesseuh]

Looks good to me :)