move set/remove stencilHighlight to View and implement via OverlayManager

thermion_dart/native/include/c_api/APIBoundaryTypes.h

@@ -47,6 +47,7 @@ extern "C"
 	typedef struct TFilamentAsset TFilamentAsset;
 	typedef struct TColorGrading TColorGrading;
 	typedef struct TKtx1Bundle TKtx1Bundle;
+	typedef struct TOverlayManager TOverlayManager;
 	
 	typedef struct { 
 		double x;