Add CLion CMake facade project generation

Add CLion as a supported editor workflow for native C++ development.
The new -clion generation option writes a CMake facade project under
Cache/Projects/CMake/<ProjectName>, exposing a CLion-friendly code model,
build presets, and launcher targets while keeping Flax.Build as the source
of truth for native builds.

Source/Editor/Scripting/CodeEditor.cpp

@@ -6,6 +6,7 @@
 #include "ScriptsBuilder.h"
 #include "CodeEditors/VisualStudioCodeEditor.h"
 #include "CodeEditors/RiderCodeEditor.h"
+#include "CodeEditors/CLionCodeEditor.h"
 #if USE_VISUAL_STUDIO_DTE
 #include "CodeEditors/VisualStudio/VisualStudioEditor.h"
 #endif
@@ -269,6 +270,7 @@ bool CodeEditingManagerService::Init()
 #endif
     VisualStudioCodeEditor::FindEditors(&CodeEditors);
     RiderCodeEditor::FindEditors(&CodeEditors);
+    CLionCodeEditor::FindEditors(&CodeEditors);
     CodeEditors.Add(New<SystemDefaultCodeEditor>());
 
     return false;