[feat] Add comprehensive unit tests

[kyegomez]

Summary

Implement comprehensive unit tests to ensure code quality, reliability, and maintainability.

Description

The project needs a robust unit testing suite to validate functionality and catch regressions early in the development cycle.

Requirements

• Set up testing framework (pytest recommended)
• Add unit tests for core agent functionality
• Add tests for tool integration
• Add tests for prompt handling
• Add tests for configuration and initialization
• Set up test coverage reporting
• Add tests for error handling and edge cases
• Configure CI/CD to run tests automatically

Test Coverage Goals

• Core agent logic
• Tool registration and execution
• Prompt processing
• Configuration management
• Error handling
• Integration points

Benefits

• Early bug detection
• Safer refactoring
• Better code documentation through tests
• Increased confidence in code changes
• Easier onboarding for new contributors

Acceptance Criteria

• Test suite runs successfully
• Minimum 80% code coverage
• All critical paths are tested
• Tests are documented and maintainable
• CI/CD pipeline includes test execution
• Testing documentation added to README

Suggested Tools

• pytest for testing framework
• pytest-cov for coverage reporting
• pytest-asyncio if async tests are needed