…l README

- collector.py: Implement get_ip_and_mac_address() function to retrieve IP and MAC addresses from same network interface using multiple detection methods including socket connection, PowerShell commands, and getmac utility
- collector.py: Add get_mac_for_ip() helper function to match MAC address with specific IP address using PowerShell network configuration queries
- collector.py: Update HardwareCollector.get_hardware_info() to include MAC address in collected system information alongside IP address
- .gitignore: Add ignore patterns for compiled Python files, virtual environments, logs, coverage reports, IDE files and build artifacts
- test_brand_database.py: Create comprehensive unit tests for brand detection functionality with mock database implementation
- test_data_handler.py: Create complete test suite for DataHandler class covering initialization, data loading/saving, and Excel export functionality with proper mocking of Windows-specific modules