Implement python environment and dependency management

[j-emberton]

The project/environment manager is an essential part of enforcing consistency across multiple developers. Two main choices exist - Poetry and uv. Both are good although uv has some useful extra features not present in Poetry.

The environment manager will at a minimum provide:

• Creation of pyproject.toml
• Creation of environment definition file
• Creation of environment lock file

The environment manager is only active when the project is cloned locally for development. It doesn't not affect the operation of python packages.

Tasks

• Integrate chosen environnent/project management into repo
• Add Developer environment installation instructions to ReadMe