plotting – Drawing corrdinate axes in a 3D plot

How can one draw the coordinate system, i.e., x, y, and z axes with origin at (0,0,0) in the following plot

  tr = With({g=0.7},
   Composition(
   TranslationTransform({0, 0, g}),
   ScalingTransform({Sqrt(1-g),Sqrt(1-g),(1-g)})
 )
);

Region(
  TransformedRegion(Sphere(),tr)
  ,PlotTheme->"Detailed"
  ,PlotRange->{{-1,1},{-1,1},{-1,1}}
)