137 setuptools is not installing requirements properly

[emlynjdavies]

This is a PR to merge into #129

• fixes setuptools is not installing requirements properly #137
• fixes Warnings in Tests #125
• fixes Tensorflow 2.10.1 does not support python 3.11 #122

A switch to poetry-managed dependencies and install, instead of setuptools and requirements.txt: https://mathdatasimplified.com/2023/06/12/poetry-a-better-way-to-manage-python-dependencies/

Note:

Tensorflow doesn't work properly on the gihub windows test when installing with poetry (despite working locally on a windows machine). It does work on github when installing with pip, so I think putting a ubuntu test using poetry and a windows test using pip is satisfactory for now. This way we can test pyopia functionality in both windows and linux.

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A check that a pip install of pyopia from github uses the correct pyopia version number:

pip install git+https://github.com/SINTEF/pyopia.git@137-setuptools-is-not-installing-requirements-properly

Gives expected version, and means there is backwards compatibility for the 'user install'.

Updates to developer install

Developer install should be done using:

poetry install

(instead of the old python setup.py develop)
and dependencies added using poetry add. It is encouraged to commit the poetry.lock file if you change or update dependencies.

Tests can be run locally using:

poetry run pytest

(instead of the old python setup.py test