Card component accessibility with ARIA attributes

[monayemislam]

feat(card): add ARIA attributes for accessibility

• Add role="region" to identify card as a distinct section
• Add aria-labelledby prop to associate with headings
• Add aria-describedby prop for descriptions

The Card component now supports screen readers better while maintaining its existing implementation pattern.

[tnylea]

Hey @monayemislam,

Thanks for the PR, but we are going to keep the components the way they currently exist in the components/ui folder. We are going to be upgrading these as well when a stable Tailwind v4 version is available from the UI library: https://www.shadcn-vue.com/

Closing for now. Appreciate it!