Introduces a full test suite under the tests/ directory, including API, service, connector, and utility tests, along with fixtures and documentation. Expands Makefile with granular test commands for unit, integration, API, service, connector, coverage, and quick tests. Adds configuration files for pytest and coverage reporting, and provides a quickstart guide for testing workflow.
This commit modifies the Makefile to ensure consistent command execution by changing the directory context for the backend startup command. Additionally, it corrects formatting in the output messages for better readability. These changes contribute to a more robust development environment.
