Extract-model

What's New

* Updated the docs so that the notebooks are compiled with myst-nb.
* Updated pull_request_template.md.
* some changes to get release to work correctly (unlisted versions)

Hopeful fix for release that works with PyPI.

Small changes but fixes release. Also a few packaging changes along the way.

What's New

Two main changes in `sel2d` / `sel2dcf`:

* a mask can be input to limit the lons/lats from the DataArray/Dataset that are used in searching for the nearest point with `xoak`, in case the nearest model point is on land but we still want a valid model point returned.
* incorporating changes from xoak that optional return distance of the model point(s) from the requested point(s).

Refined requirements and other small updates.

What's New
* Simplified dependencies
* Now available on PyPI!

What's New

* An optional subsetting option that enables subsetting directly on the target
dataset's dimensions. For remote datasets, this ensures that remote requests
ask for minimal slices. `em.sub_grid(..., naive=True)`.
* Adds `preload` argument for unstructured grid subsetting. Radically improves xarray resolution
times after subsetting.