Added sphinx documentation for Python bindings

Added sphinx documentation for the opm.simulators.BlackOilSimulator
Python module. Added GitHub action workflow to deploy sphinx
documentation to GitHub Pages.

python/sphinx_docs/README.md

@@ -0,0 +1,23 @@
+# Python scripts for building opm-simulators sphinx documentation
+
+## Installation of the python scripts
+- Requires python3 >= 3.10
+
+### Using poetry
+For development it is recommended to use poetry:
+
+- Install [poetry](https://python-poetry.org/docs/)
+- Then run:
+```
+$ poetry install
+$ poetry shell
+```
+
+### Installation into virtual environment
+If you do not plan to change the code, you can do a regular installation into a VENV:
+
+```
+$ python -m venv .venv
+$ source .venv/bin/activate
+$ pip install .
+```