setup for the pint-xarray index description

Author: keewis

docs/agnostic/pint.md

@@ -1 +1,27 @@
+---
+jupytext:
+  text_representation:
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  name: python
+---
+
 # PintIndex
+
+````{grid}
+```{grid-item}
+:columns: 3
+```{image} https://pint.readthedocs.io/en/latest/_static/logo-full.png
+---
+alt: pint-xarray logo
+width: 200px
+align: center
+---
+```
+```{grid-item}
+:columns: 9
+```{seealso}
+Learn more at the [pint-xarray](https://pint-xarray.readthedocs.io/en/latest/) documentation page.
+```
+````