Bump to Jupyter Book v1.0

[scottyhq]

Addresses #241, #188, #88

Drops sphinx-exercise which seems unmaintained and not compatible with JupyterBook v1

Replaces #242

[review-notebook-app]

Check out this pull request on

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[scottyhq]

Exercises now rendered consistently in website and jupyterlab with gated syntax (https://myst-parser.readthedocs.io/en/latest/syntax/admonitions.html)

::::{admonition} Exercise
:class: tip
Calculate the rolling mean in 5 point bins along both latitude and longitude using
[`rolling(...).reduce`](https://docs.xarray.dev/en/stable/generated/xarray.core.rolling.DataArrayRolling.reduce.html)
:::{admonition} Solution
:class: dropdown
```python
# exactly equivalent to data.rolling(...).mean()
data.rolling(lat=5, lon=5, center=True).reduce(np.mean).plot();
```
:::
::::

[JessicaS11]

Woohoo! Thanks for tackling this, Scott!

[github-actions]

😭 Deploy PR Preview 8dc179b failed. Build logs

_{🤖 By surge-preview}