Document some more categorical methods (pandas-dev#56928)

* Document some more categorical methods

* Render pages for Categorical methods

Author: ivirshup

doc/source/reference/arrays.rst

@@ -539,6 +539,21 @@ To create a Series of dtype ``category``, use ``cat = s.astype(dtype)`` or
 If the :class:`Series` is of dtype :class:`CategoricalDtype`, ``Series.cat`` can be used to change the categorical
 data. See :ref:`api.series.cat` for more.
 
+More methods are available on :class:`Categorical`:
+
+.. autosummary::
+   :toctree: api/
+
+   Categorical.as_ordered
+   Categorical.as_unordered
+   Categorical.set_categories
+   Categorical.rename_categories
+   Categorical.reorder_categories
+   Categorical.add_categories
+   Categorical.remove_categories
+   Categorical.remove_unused_categories
+   Categorical.map
+
 .. _api.arrays.sparse:
 
 Sparse

pandas/core/arrays/categorical.py

@@ -293,6 +293,15 @@ class Categorical(NDArrayBackedExtensionArray, PandasObject, ObjectStringArrayMi
     Methods
     -------
     from_codes
+    as_ordered
+    as_unordered
+    set_categories
+    rename_categories
+    reorder_categories
+    add_categories
+    remove_categories
+    remove_unused_categories
+    map
     __array__
 
     Raises