feat(scripting): add mono csharp runtime foundation

CMakeLists.txt

@@ -6,8 +6,16 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 enable_testing()
 
+option(XCENGINE_ENABLE_MONO_SCRIPTING "Build the Mono-based C# scripting runtime" ON)
+set(
+    XCENGINE_MONO_ROOT_DIR
+    "${CMAKE_SOURCE_DIR}/参考/Fermion/Fermion/external/mono"
+    CACHE PATH
+    "Path to the bundled Mono distribution used by the scripting runtime")
+
 add_subdirectory(engine)
 add_subdirectory(editor)
+add_subdirectory(managed)
 add_subdirectory(mvs/RenderDoc)
 add_subdirectory(tests)
 add_subdirectory(tests/opengl)