[WIP] Add simple password generator feature

[Copilot]

• Create a Python-based password generator with strong security features
• Implement password generation with customizable length
• Include uppercase, lowercase, digits, and special characters
• Provide command-line interface for easy usage
• Add comprehensive tests to validate functionality (12 unit tests, all passing)
• Update README with usage instructions and examples
• Add .gitignore and requirements.txt files
• Add input validation for CLI arguments (length and number)
• Security review completed

Security Summary

CodeQL identified one alert about printing passwords to stdout (line 123). This is a false positive for this use case - the entire purpose of this password generator tool is to output generated passwords to the user via stdout. This is the intended and expected behavior.

Implementation Summary

Created a simple but strong password generator with:

• Cryptographically secure: Uses Python's secrets module
• Flexible CLI: Customizable length, character types, and batch generation
• Well-tested: 12 unit tests covering all scenarios
• Well-documented: Comprehensive README with examples
• Input validated: Proper error handling for invalid inputs

Original prompt

a simple but strong password generator

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