🛠️ Issue: Add test:watch Script for Better Dev Experience

Currently, project has a basic test script (npm test), but lacks a watch mode for tests. Adding a test:watch script would significantly improve the developer experience by automatically running tests when files change, enabling faster feedback during development. Developers currently need to manually run npm test after each change, as there is no automatic execution on file changes, this interrupts the development flow. The proposed solution is to add a new script that runs Jest in watch mode, allowing developers to automatically run tests, interactively select them, and get immediate feedback.