feat: add Terms and Conditions page with sticky sidebar + scroll spy

[ArshiBansal]

📝 Pull Request Description

Related Issue

Closes #253

Summary

Created a Terms and Conditions page matching the design and user experience of the Privacy Policy page.

• Implemented left sidebar (Table of Contents) with sticky positioning
• Right-side main content with expandable accordion sections
• Scroll-spy functionality to highlight active section in sidebar
• Consistent styling, animations, and navigation with the rest of the site
• Added proper route-ready component (TermsandConditions.jsx)

This improves legal transparency and user trust while maintaining a modern, professional UI.

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Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature
• ♻️ Refactoring
• 📝 Documentation update
• 🎨 UI/UX improvement
• 🔥 Other(please describe) ______

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How Has This Been Tested?

• Verified left sidebar sticky behavior and active section highlighting
• Tested smooth scrolling from sidebar links to respective sections
• Confirmed accordion expand/collapse works correctly
• Checked responsiveness (sidebar hides on mobile)
• Validated Back to Home button and footer link navigation
• Ensured consistent dark theme and violet accents with existing pages

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Screenshots (if applicable)

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Checklist

• My code follows the project's guidelines
• I have tested my changes
• I have updated documentation where necessary
• I have linked the related issue
• My changes do not introduce new warnings or errors

[KaranUnique]

@ArshiBansal Share screen shot for this too

[ArshiBansal]

@KaranUnique i will surely share but currently facing issues with nom setup

[ArshiBansal]