Update CMakeLists.txt to pass simulator type to docstring generator

- Add 'BlackOil' as 5th parameter to generate_docstring_hpp.py
- Prepares for template-based docstring generation
- Will work with updated opm-common generate_docstring_hpp.py script

Author: hakonhagland

python/docstrings_simulators.json

@@ -1,4 +1,5 @@
 {
+    "_usage_information": "This file defines documentation for OPM Python simulator bindings. It uses a template format where {{name}} is replaced with the simulator name (e.g., BlackOilSimulator) and {{class}} with the internal class name (e.g., PyBlackOilSimulator). The 'simulators' section defines available simulators, 'constructors' defines shared constructor documentation, and 'common_methods' defines documentation for methods shared by all simulators. This file is processed by: (1) opm-common/python/generate_docstring_hpp.py to generate C++ header files with docstrings, (2) opm-python-documentation/.../sphinx_ext_docstrings.py to generate Sphinx documentation. To add a new simulator, add an entry to the 'simulators' section with 'class', 'name', and 'doc' fields.",
     "simulators": {
         "BlackOil": {
             "class": "PyBlackOilSimulator",

python/simulators/CMakeLists.txt

@@ -16,7 +16,7 @@ add_custom_command(
     OUTPUT ${PYTHON_DOCSTRINGS_GENERATED_HPP}
     COMMAND ${CMAKE_COMMAND} -E env PYTHONPATH=${CMAKE_SOURCE_DIR}
             ${PYTHON_EXECUTABLE} ${PYTHON_GENERATE_DOCSTRINGS_PY}
-            ${PYTHON_DOCSTRINGS_FILE} ${PYTHON_DOCSTRINGS_GENERATED_HPP} PYBLACKOILSIMULATORDOC_HPP "Opm::Pybind::DocStrings"
+            ${PYTHON_DOCSTRINGS_FILE} ${PYTHON_DOCSTRINGS_GENERATED_HPP} PYBLACKOILSIMULATORDOC_HPP "Opm::Pybind::DocStrings" "BlackOil"
     DEPENDS ${PYTHON_DOCSTRINGS_FILE}
     COMMENT "Generating PyBlackOilSimulatorDoc.hpp from JSON file"
 )