Split up plotting notebooks (xarray-contrib#90)

* Split up plotting notebooks

Closes xarray-contrib#89

* Update link

Author: dcherian

_toc.yml

@@ -17,12 +17,17 @@ parts:
       - file: fundamentals/03.1_computation_with_xarray
         sections:
           - file: fundamentals/03.2_groupby_with_xarray
-      - file: fundamentals/04_plotting_and_visualization
+      - file: fundamentals/04.0_plotting.md
+        sections:
+          - file: fundamentals/04.1_basic_plotting
+          - file: fundamentals/04.2_faceting
+          - file: fundamentals/04.3_geographic_plotting
 
   - caption: Intermediate
     chapters:
       - file: intermediate/01-high-level-computation-patterns
       - file: intermediate/xarray_and_dask
+      - file: intermediate/hvplot
 
   - caption: Advanced
     chapters:
@@ -58,7 +63,7 @@ parts:
             title: Computation
           - url: https://tutorial.xarray.dev/fundamentals/03.2_groupby_with_xarray
             title: Groupby
-          - url: https://tutorial.xarray.dev/fundamentals/04_plotting_and_visualization.html
+          - url: https://tutorial.xarray.dev/fundamentals/04.0_plotting.html
             title: Plotting and Visualization
           - file: workshops/scipy2022/xarray_ecosystem
           - url: https://tutorial.xarray.dev/fundamentals/06_xarray_and_dask

fundamentals/04.0_plotting.md

@@ -0,0 +1 @@
+# Plotting and Visualization