repr(da.xrs.slope) prints the whole accessor catalog instead of the tool's own info

[brendancol]

Description

Commit 8bb7c16 (#3476/#3477) gave the .xrs accessor a categorized __repr__, so da.xrs and ds.xrs list the available operations grouped by category. That part works.

The problem shows up one level down. Evaluating a single tool without calling it, e.g. da.xrs.slope, prints the entire accessor listing again instead of information about slope:

>>> da.xrs.slope
<bound method XrsSpatialDataArrayAccessor.slope of <XrsSpatialDataArrayAccessor> xarray-spatial tools for this DataArray
call as: .xrs.<name>(...)

Plot:
    plot
Surface:
    slope, aspect, hillshade, curvature
... (the whole catalog) ...>

da.xrs.slope is a bound method. Python builds a bound method's repr as <bound method Cls.name of {repr(self)}>, and repr(self) now routes through the accessor's custom __repr__, so the full catalog ends up embedded in the bound-method repr.

Expected behavior

Evaluating da.xrs.slope should show information scoped to slope only: its call signature and docstring, the same documentation help(da.xrs.slope) already surfaces. The docstring is already attached to each accessor method (see _attach_delegated_docs), so the per-tool repr can reuse it.

Steps to reproduce

import numpy as np, xarray as xr, xrspatial
da = xr.DataArray(np.ones((4, 4)), dims=['y', 'x'])
da.xrs.slope   # prints the whole accessor catalog instead of slope's info

Environment

• xarray-spatial: main (after Add categorized repr to the .xrs accessor (#3476) #3477)