Card Component: Create style override for Pf6 Card component

[ArathyKumar]

Generate a style override to align the PF6 card component with the appearance of the PF5 card.

Checklist to be completed:

• Ensure all CSS properties, including padding, margin, font size, etc., are aligned.
• Verify that the border radius is consistent.
• Confirm that the appearance matches in both dark and light modes.
• Ensure responsiveness has been thoroughly tested