[BUG FIX] Styled footer properly for contact page.

[KalangiGeetaneha]

Closes #858

Rationale for this change

The contact page previously lacked a consistent and visually appealing footer. This update introduces a modern, responsive, and theme-compatible footer that aligns with the overall site design.
It improves visual hierarchy, accessibility, and maintains design consistency with dark/light theme support.

What changes are included in this PR?
Added a new styled footer section specific to the Contact Page.
Implemented responsive grid layout for contact information, social links, and quick navigation.
Added dark/light theme compatibility with smooth transitions.
Optimized padding, spacing, and typography for better visual balance.
Fixed extra bottom spacing issue previously present in the footer.
Improved overall footer structure for maintainability and future extensibility.

Are these changes tested?
Verified responsive behavior on multiple screen sizes (mobile, tablet, desktop).
Tested dark and light mode toggle functionality.
Checked for consistent styling across browsers (Chrome, Edge, Firefox).
Validated HTML and CSS for syntax and accessibility compliance.

Are there any user-facing changes?
Yes.
The Contact page footer now features a refreshed, consistent design with improved readability and interaction.
Users will notice smoother theme transitions and better spacing alignment.
Enhanced visual clarity of contact info and social media links.

[github-actions]

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