feat: Display Thank u msg on conatct US form

[Ishika-Gupta06]

🚀 Pull Request

Description

Success message div: This is the box that will display the "Thank you" message and disappear after 5 seconds. It's styled to be translucent green and centered on the page. JavaScript functionality: Prevents the default form submission, displays the message, hides it after 5 seconds, and clears the form fields.

Fixes #296

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation Update

Checklist:

• [ X] My code follows the style guidelines of this project
• [ X] I have performed a self-review of my own code
• [ X] I have commented my code, particularly in hard-to-understand areas
• [ X] I have made corresponding changes to the documentation
• [ X] My changes generate no new warnings
• [ X] I have added tests that prove my fix is effective or that my feature works
• [ X] New and existing unit tests pass locally with my changes
• [ X] Any dependent changes have been merged and published in downstream modules

Screenshot of final output/video

https://github.com/user-attachments/assets/39773c3b-736d-4e9d-ab24-5a69d5c0cdaf

[Ishika-Gupta06]

@07sumit1002 PLEASE REVIEW THE PR