Add Unit Tests / Testing Setup

[Yasir761]

To ensure the reliability and stability of our project, we need to set up unit tests for key components and functions. Having a solid test suite will help catch bugs early and improve the overall quality of the codebase.

Preferred Testing Framework:
Please use Jest for the test setup, as it’s widely adopted and well-suited for our project.
Additionally, React Testing Library is recommended for testing the rendering and behavior of React components.
If you're familiar with other testing libraries that integrate well with Jest or enhance the tests, feel free to suggest or implement them.
Requirements:
Set up the test environment with Jest and React Testing Library.
Write initial unit tests for key components.
Ensure tests run successfully both locally and during CI