Add PCH for JSystem (#2645)

src/JSystem/J2DGraph/J2DOrthoGraph.cpp

@@ -1,3 +1,5 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
 #include "JSystem/J2DGraph/J2DOrthoGraph.h"
 #include "dolphin/gx.h"
 
@@ -90,4 +92,4 @@ void J2DDrawFrame(JGeometry::TBox2<f32> const& box, JUtility::TColor color, u8 l
     oGrph.setColor(color);
     oGrph.setLineWidth(line_width);
     oGrph.drawFrame(box);
-}
+}