Add more descriptive headings (#17)

Author: dcherian

docs/agnostic/pint.md

@@ -7,7 +7,7 @@ kernelspec:
   name: python
 ---
 
-# pint-xarray: PintIndex
+# Units with `pint_xarray.PintIndex`
 
 ````{grid}
 ```{grid-item}

docs/blocks/ndpoint.md

@@ -1 +1 @@
-# NDPointIndex
+# Tree-based indexes with `NDPointIndex`

docs/blocks/transform.md

@@ -1 +1 @@
-# CoordinateTransformIndex
+# Functional transformations with `CoordinateTransformIndex`

docs/builtin/pdinterval.md

@@ -7,7 +7,7 @@ kernelspec:
   name: python
 ---
 
-# pandas: IntervalIndex
+# Intervals with `pandas.IntervalIndex`
 
 ````{grid}
 ```{grid-item}

docs/builtin/range.md

@@ -1 +1 @@
-# RangeIndex
+# Large ranges with `RangeIndex`

docs/earth/forecast.md

@@ -7,7 +7,7 @@ kernelspec:
   name: python
 ---
 
-# rolodex: Weather Forecasts
+# Weather forecast cubes with `rolodex.ForecastIndex`
 
 ```{seealso}
 Learn more at the [rolodex](https://rolodex.readthedocs.io) documentation.

docs/earth/raster.md

@@ -7,7 +7,7 @@ kernelspec:
   name: python
 ---
 
-# rasterix: RasterIndex
+# Raster affine transforms with `rasterix.RasterIndex`
 
 ````{grid}
 ```{grid-item}

docs/earth/xdggs.md

@@ -7,7 +7,7 @@ kernelspec:
   name: python
 ---
 
-# xdggs: DGGSIndex
+# Discrete Global Grid Systems with `xdggs.DGGSIndex`
 
 ````{grid}
 ```{grid-item}

docs/earth/xproj.md

@@ -7,7 +7,7 @@ kernelspec:
   name: python
 ---
 
-# xproj: CRSIndex
+# Coordinate Reference Systems with `xproj.CRSIndex`
 
 ```{seealso}
 Learn more at the [xproj](https://xproj.readthedocs.io) documentation

docs/earth/xvec.md

@@ -7,7 +7,7 @@ kernelspec:
   name: python
 ---
 
-# xvec: GeometryIndex
+# Geometries and Vector Data Cubes with `xvec.GeometryIndex`
 
 ````{grid} 12
 ```{grid-item}