Added 30 .base.md files using the mmg (Multilingual Markdown Generator)
format to automatically generate English (.md) and French (.fr.md)
versions of all project documentation.
Updated conf/make.documentation.Makefile to process all .base.md files
via `make doc_markdown`.
- Auto regenerate poetry pyproject.toml from all requirements.txt with
script poetry_update.py
- Sort dependancy in pyproject.toml
- Rename directory venv to .venv
- In bash, use USER instead of whoami
- Remove python3 from ubuntu dependancy. Ignore python from system.
- Use pyenv with poetry
- Simplify pip installation script
