doc: add docs for exceptions

Author: beckermr

jax_galsim/interpolatedimage.py

@@ -60,6 +60,8 @@ def __dir__(cls):
 - the pad_image options
 - depixelize
 - most of the bounds checks, type checks, and dtype casts done by galsim
+- raises a generic ``Exception`` instead of a more specific one for some
+  initialization errors
 """