add state print to review mu map

mu_map/data/review_mu_map.py

@@ -84,6 +84,7 @@ if __name__ == "__main__":
     controls = "l = discard last, f = discard first, b = discard both, n = discard none"
 
     for i, (_, μ_map) in enumerate(dataset):
+        print(f"Image {str(i + 1):>{len(str(len(dataset)))}}/{len(dataset)}", end="\r")
         slice_first = to_grayscale(μ_map[0])
         slice_last = to_grayscale(μ_map[-1])