chore(#750): migrate to tailwind 4

[confraria]

closes #750

😅 I'm not very convinced with this solution as:

• The ts files with colors are now duplicated with the global.css theme block
• Not sure if the way to replace the plugin is the css import

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[agubler]

@confraria I haven't tried this but could we keep a published plugin with users consuming it using the @plugin syntax? Is this something you tried during the upgrade?

[confraria]

@confraria I haven't tried this but could we keep a published plugin with users consuming it using the @plugin syntax? Is this something you tried during the upgrade?

That was my first approach but after reading the plugin, the only thing that it was doing was adding the library files to scan.
So the @source seemed more appropriate.

I guess to keep publishing the plugin won't hurt. Maybe it can also support tailwind 3.