Add user input for search terms, improved comments and added chromedriver_autoinstaller to requirement

[kamalkhnl]

1. Added user input for search terms

• Users can now enter multiple search terms separated by commas when running the script
• The script validates input and provides feedback on what will be searched

5. Improved ChromeDriver handling

• Added chromedriver_autoinstaller to requirements.txt
• Eliminated manual ChromeDriver download and management
• Automatically detects and installs the appropriate ChromeDriver version for the user's Chrome installation

11. Enhanced code documentation

• Added comprehensive docstrings and comments
• Improved code organization and readability
• Better parameter descriptions for easier configuration

16. Optimized thread management

• Dynamically adjusts the number of worker threads based on search terms
• Prevents resource overutilization when running multiple searches