Add CMake support for also building Markdown docs in parallel (#49)

cmake/SetupSphinx.cmake

@@ -0,0 +1,27 @@
+# SetupSphinx.cmake - Find Sphinx for CI environments
+
+# Function to find Sphinx in the system
+function(setup_sphinx_environment)
+    # Find sphinx-build executable in system
+    find_program(SPHINX_EXECUTABLE
+        NAMES sphinx-build
+        DOC "Sphinx documentation generator"
+    )
+
+    if(NOT SPHINX_EXECUTABLE)
+        message(FATAL_ERROR "sphinx-build not found. Please install Sphinx.")
+    endif()
+
+    # Get Sphinx version
+    execute_process(
+        COMMAND ${SPHINX_EXECUTABLE} --version
+        OUTPUT_VARIABLE SPHINX_VERSION_OUTPUT
+        ERROR_VARIABLE SPHINX_VERSION_OUTPUT
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    message(STATUS "Found Sphinx: ${SPHINX_EXECUTABLE}")
+    message(STATUS "${SPHINX_VERSION_OUTPUT}")
+
+    # Export to parent scope
+    set(SPHINX_EXECUTABLE "${SPHINX_EXECUTABLE}" PARENT_SCOPE)
+endfunction()