[Enhancement]: Add Success Message to Contact Form

[akshay0611]

Problem: The current contact form lacks feedback for users after submission, which may lead to confusion about whether their message was successfully sent.

Proposed Solution:

• Add a success message that appears after the form is submitted successfully.
• Use JavaScript to handle the form submission and dynamically display the success message.

Expected Outcome: A contact form that provides clear feedback to users after submission, improving user experience and engagement.