feat: Setup Jest and created mock tests

[syoo881]

Add Basic Tests for Basic Component Rendering

Context

Configured a proper setup for writing unit tests using Jest and React Testing Library. This work is important for writing and running tests in future development.

What Changed?

• Created a __tests__ directory within src to house our test files.
• Moved App.test.js and created Home.test.js within this new directory.
• Implemented basic tests for App and Home components to ensure they render without crashing.

How To Review

1. Clone the branch and install dependencies with npm install.
2. Run npm test in the project root to execute the smoke tests for App.js and Home.js.
3. Verify that both tests pass without errors.

Testing

• Executed npm test in the project root to confirm all tests run successfully.
• Verified that no additional dependencies were required to run the tests.

Risks

• Low risk as this PR only adds tests without modifying existing functionality.
• Reviewers should ensure that npm test runs without requiring additional setup or dependencies.

Notes

• Jest and React Testing Library were already configured within our Create React App setup. No modifications to package.json or package-lock.json were necessary.
• npm test -- --coverage can be used to check test coverage

Next Steps

• Expand test coverage by adding more detailed tests for Home and App components.
• Create similar basic tests for other key components in our application.
• Consider adding integration tests as the application grows in complexity.