[Feature]: Add Newsletter Subscription in Footer with Toast Notifications + Footer Redesign

[akofficial10]

Summary
Currently, the footer only contains contact details and social media links. To improve user engagement, we should add a newsletter subscription form in the footer with toast notifications for success/error messages.
Newsletter Subscription
Add a simple email input box with a Subscribe button.
On successful subscription, display a toast notification confirming the action.
Handle error states with appropriate toast notifications (e.g., invalid email, server error).
Footer Redesign
Make the footer layout cleaner and more structured for usability.
Consider separating sections with clearer hierarchy (e.g., Company, Contact, Legal, Community).
Improve spacing, typography, and icons for readability.

[github-actions]

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