Upgrade to Tailwind 4

[jamiefeiss]

Upgraded the component library and Prez UI base layer & template to Tailwind v4 & Shadcn-vue v2. This will be a breaking change for people updating from <4.2.0 with existing themes in Tailwind v3.

The theming process is a little different but the documentation has been updated. I have also documented the upgrade process for existing themes and have made an upgrade script that does most of the process for you.

[hjohns]

Hi Jamie,

All looked pretty good. Enjoyed using the new task file!

With the styling changes, it'd be good to have a joint session when we're together to review styles used in other instances and how changes are managed.

Noticed there was a new console warning:

[hjohns]

Is it possible to move the UI styling changes into a separate PR to the tailwind update?

[jamiefeiss]

Template package fails type check due to needing to pin currently published version of prez-ui. The local version contains the fix for this type error, so we will need to bypass this check when merging this PR.

I will address this in a later PR to better handle the local package versions during publish.

[jamiefeiss]

FYI: Extraneous props warning caused by Literal & ItemLink top-level slot causing lack of root node issue

[hjohns]

Looks good, I did have a project/env specific issue, but I think it's good to progress.

[jamiefeiss]

Still need a couple updates, I'll let you know when it's ready for approval