Add pyproject.toml for PEP 517/518 compliance

[moshesham]

Problem

The project lacks a proper package configuration file, preventing:

• Installation as editable package (pip install -e .)
• Proper dependency management
• Following modern Python packaging standards

Impact

• Cannot install project as package
• Import path issues
• Not following PEP 517/518 standards
• Harder to distribute

Tasks

• Create pyproject.toml with above configuration
• Test installation: pip install -e .
• Test dev installation: pip install -e ".[dev]"
• Update README.md installation instructions
• Update Dockerfile to use pyproject.toml
• Verify all tools (black, mypy, pytest) use config from pyproject.toml
• Remove redundant configuration files if any

After Creation

Developers can install with:

# Regular installation
pip install -e .

# Development installation with all tools
pip install -e ".[dev]"

References

• PROJECT_REVIEW.md Issue Add pyproject.toml for PEP 517/518 compliance #15
• PRODUCT_ROADMAP.md TASK-001