Add a page to list exceptions and warnings

Author: antonwolfy

doc/reference/exceptions.rst

@@ -0,0 +1,14 @@
+.. _routines.exceptions:
+
+Exceptions and Warnings
+=======================
+
+General exceptions used by DPNP. Note that some exceptions may be module
+specific, such as linear algebra errors.
+
+.. currentmodule:: dpnp.exceptions
+
+Exceptions
+----------
+
+.. autodata:: DLPackCreationError

doc/reference/routines.rst

@@ -15,6 +15,7 @@ These functions cover a subset of
    array-manipulation
    bitwise
    dtype
+   exceptions
    fft
    functional
    indexing