🎨 Palette: Add keyboard accessibility to interactive project and experience cards

[Dev22603]

💡 What: Made the interactive motion.div elements for projects and experiences fully accessible by adding role="button", tabIndex={0}, and onKeyDown handlers for Enter and Space keys, along with focus-visible styles. Also resolved underlying Vite build and ESLint configuration issues to ensure clean CI.
🎯 Why: Users navigating with keyboards or assistive technology could not interact with the project and experience cards, preventing them from accessing the detailed modals.
📸 Before/After: Visual verification screenshot generated showing proper focus rings when tabbing through cards.
♿ Accessibility: Ensures full WCAG keyboard navigation compliance for interactive custom elements by providing proper roles, focus states, and key handlers (e.preventDefault() properly used for Space bar).

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PR created automatically by Jules for task 7024678212973259660 started by @Dev22603

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