Add placeholders for Pint bits and pieces, update once PR merged

PR link: hgrecco/pint#684

Author: znicholls

doc/source/ecosystem.rst

@@ -339,12 +339,14 @@ Cyberpandas provides an extension type for storing arrays of IP Addresses. These
 arrays can be stored inside pandas' Series and DataFrame.
 
 `pint`_
-~~~~~~~~~~~~~~
+~~~~~~~
+
+`Pint <https://pint.readthedocs.io/en/latest/>` provides an extension type for
+storing numeric arrays with units. These arrays can be stored inside pandas'
+Series and DataFrame. Operations between Series and DataFrame columns which
+use pint's extension array are then units aware.
 
-Pint provides an extension type for storing numeric arrays with units. These
-arrays can be stored inside pandas' Series and DataFrame. Operations between
-Series and DataFrame columns which use pint's extension array are then units
-aware.
+Add comment about minimum Pint version required once PR merged (see https://github.com/hgrecco/pint/pull/684)
 
 .. _ecosystem.accessors:
 

doc/source/whatsnew/v0.23.5.txt

@@ -30,7 +30,6 @@ Fixed Regressions
 Development
 ~~~~~~~~~~~
 - The minimum required pytest version has been increased to 3.6 (:issue:`22319`)
-- Added `Pint<https://github.com/hgrecco/pint>`_ to the `Pandas ecosystem documentation<https://pandas.pydata.org/pandas-docs/stable/ecosystem.html#ecosystem-extensions>`_
 
 .. _whatsnew_0235.bug_fixes:
 

doc/source/whatsnew/v0.24.0.txt

@@ -161,6 +161,12 @@ This is the same behavior as ``Series.values`` for categorical data. See
 
 .. _whatsnew_0240.enhancements.other:
 
+Pint Support
+^^^^^^^^^^^^
+# remove once Pint merge done (see https://github.com/hgrecco/pint/pull/684), note docs will go live once Pint merge is done,
+Added `Pint<https://github.com/hgrecco/pint>`_ to the `Pandas ecosystem documentation<https://pandas.pydata.org/pandas-docs/stable/ecosystem.html#ecosystem-extensions>`_.
+Documentation of how to use Pint with Pandas can be found in the `Pint documentation <https://github.com/hgrecco/pint/blob/master/docs/pandas.rst>`_.
+
 Other Enhancements
 ^^^^^^^^^^^^^^^^^^
 - :func:`to_datetime` now supports the ``%Z`` and ``%z`` directive when passed into ``format`` (:issue:`13486`)