Upgrade to Tailwind v4

[jbrooksuk]

Cachet would benefit from upgrading to Tailwind v4. This could lead to a really powerful theming system beyond the accents feature we currently have.

https://tailwindcss.com/docs/upgrade-guide

[ylynfatt]

I'd be willing to give this a try.

[jbrooksuk]

I'd be willing to give this a try.

That would be awesome, @ylynfatt!

[ylynfatt]

@jbrooksuk I'm wondering if this change may cause an issue with Filament at the moment. It seems for now Filament have pinned v3 of their package to v3 of Tailwind. See recent tagged release for v3.2.136 by the Filament team.

I'll still try to explore the upgrade though and see what happens.