add missing ColumnKwargs to docs, and update Sphinx (#1288)

Author: dantownsend

docs/src/piccolo/api_reference/index.rst

@@ -30,6 +30,10 @@ Column
     :members:
 
 
+.. autoclass:: ColumnKwargs
+    :members:
+    :undoc-members:
+
 -------------------------------------------------------------------------------
 
 Aggregate functions

piccolo/columns/base.py

@@ -361,6 +361,11 @@ def __deepcopy__(self, memo) -> ColumnMeta:
 
 
 class ColumnKwargs(TypedDict, total=False):
+    """
+    Additional arguments which can be passed to :class:`Column` from
+    subclasses.
+    """
+
     null: bool
     primary_key: bool
     unique: bool

requirements/doc-requirements.txt

@@ -1,3 +1,3 @@
-Sphinx==7.3.7
-piccolo-theme==0.23.0
-sphinx-autobuild==2021.3.14
+Sphinx==8.3.0
+piccolo-theme==0.24.0
+sphinx-autobuild==2025.8.25