feat: Add Success Message to Contact Form

[akshay0611]

Summary: This PR adds a success message to the contact form to improve user experience. The message appears dynamically after the user submits their details, providing immediate feedback.

Changes Made:

• Added a hidden success message (<p> element) below the form.
• Implemented JavaScript to handle form submission and display the success message.
• Ensured alignment with existing CSS styles and framework conventions.

Testing:

• Verified responsiveness across different screen sizes.
• Ensured proper rendering of the contact form and success message.
• Tested the dynamic behavior of the success message.

Related Issue: Closes #19