test cases added

[mrasif]

feat: add testing infrastructure and documentation

• Comprehensive test suite for all packages (38% coverage)
• Function documentation for better maintainability
• CLI integration tests without code modification

[kernelshard]

Good initiative, need to deepen the tests to make it more comprehensive. You can do it in next PRs.

Example - Add tests for invalid input (e.g., pass a malformed URL, missing required field) and verify that the code either fails gracefully or handles it properly.

Good to Go.