Remove the list of methods and attributes from the template since
numpydoc builds its own lists for them.

Put the admonitions in the Notes section to make numpydoc to render it
properly.

Include the attributes to the class template so we can still show
detailed descriptions for them, including math and their units.
The attribute list that numpydoc generate has links to the corresponding
description of the attributes.

Configure numpydoc to show the list of attributes as the parameters
section.