test: Add Jest for Unit Testing

[lcrojano]

Description:
Implement Jest for unit testing across the codebase to ensure robust and reliable functionality of individual components.

Acceptance Criteria:

Jest is installed and configured.
Unit tests are written for existing core components.
Ensure CI integration for running tests

[arpitkuriyal]

can you assign this also to me as i working on adding github actions for automated testing so i need to add jest for unit testing also in the file to check them