Add professional frontend public page sections

[Pushpindersingh-2027]

This PR improves the public-facing AutoAudit frontend by adding professional sections that better communicate the platform’s audit and compliance value.

Changes made:

• Added Audit Readiness section
• Added Platform Value cards
• Added professional footer content
• Used existing design tokens for consistent styling
• Added responsive layout for desktop and mobile
• Verified frontend production build successfully

Testing:

• Ran npm run build successfully

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[Pushpindersingh-2027]

Thanks for the review. I have fixed the duplicate footer issue by removing the global footer from App.tsx. The public pages now use only the existing LandingFooter component, so /, /about, and /contact no longer render two footers.

[Pushpindersingh-2027]

HI I have addressed the requested changes by removing the extra vanilla CSS and moving the public section styling into Tailwind utility classes inside App.tsx. The frontend production build has also been verified successfully. Could you please review it again when you get a chance?