feat: Add success message to contact form

[akshay0611]

Summary: This PR adds a success message to the contact form to improve user experience. After submitting the form, the form is reset, and a success message is displayed to confirm the submission.

Changes Made:

• Added a success message <p> element below the form.
• Implemented JavaScript to handle form submission and dynamically 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 section and its content.
• Tested form submission and success message display functionality.

Related Issue: Closes #17