chore: update to tailwindcss v4

[benoitf]

What does this PR do?

Update to tailwindcss v4

note:

• postcss config is no longer there, need to install a separate package. But now vite plugin is provided so switch to this plug-in instead
• part to include in the css is no longer using the same stuff @tailwind ---> @import
• the config file is no longer included by default as well... https://tailwindcss.com/docs/upgrade-guide#using-a-javascript-config-file
• some rules have been renamed (like rounded or shadow or flex-grow) https://tailwindcss.com/docs/upgrade-guide#changes-from-v3

Screenshot / video of UI

What issues does this PR fix or reference?

related to podman-desktop/podman-desktop#10795

How to test this PR?

please carefully review all the screen !!!

[axel7083]

pnpm-lock.yaml is conflicting

[benoitf]

pnpm-lock.yaml is conflicting

yes but it's like egg and chicken problem. If I rebase but nobody test it I'll do rebase all the time while fixing the lock is only a small task.

[axel7083]

LGTM

[benoitf]

rebased (and now it included v4.0.1 as a new version is out)