Add a pyproject and a separate INSTALL.md

[gnebie]

Add a pyproject file and a detailled separate installation file with a poetry installation walkthrough to not overcharge the readme.

Why Add a pyproject.toml File?

The pyproject.toml file is a modern, standardized way to configure Python projects. Introduced by PEP 518, it provides a unified format for defining project metadata, dependencies, and build tools. It replaces older, fragmented configurations like setup.py, setup.cfg, and requirements.txt.

Key Benefits

• Standardization → A single configuration file for package metadata, dependencies, and build settings.
• Tooling Support → Compatible with setuptools, poetry, flit, hatch, and other modern Python package managers.
• Improved Dependency Management → Enables precise dependency specification and optional development dependencies.
• Better Build Isolation → Clearly defines the build system (setuptools, poetry-core, etc.), making installations more reproducible.
• Cleaner Project Structure → Reduces clutter by consolidating configuration settings in a single file.

By adopting pyproject.toml, projects become more portable, easier to maintain, and compatible with modern Python tooling, ensuring a smoother development experience.

[anw90]

Thanks for your contribution. I've left some comments. please rebase the code accordingly. The rest of the code LGTM.