Function fluidsimfoam.load and command fluidsimfoam-ipy-load

We need a function fluidsimfoam.load and a command fluidsimfoam-ipy-load to load a simulation created by FSF (fluidsimfoam).

See

• https://github.com/snek5000/snek5000/blob/main/setup.cfg#L49 (but we want do write this in pyproject.toml, see Poetry doc)
• https://github.com/snek5000/snek5000/blob/main/src/snek5000/util/console.py#L31
• https://github.com/snek5000/snek5000/blob/main/src/snek5000/__init__.py#L87