Add the zebra frame feature

[changliao1025]

Rationale

This PL adds a function zebra_frame to the existing geoaxes class. This function can add a zebra alike frame around an existing geoaxes object.

Implications

This might affect some gridlines function behavior, specifically for the labeling.

An example is added in the examples/gridlines_and_labels folder.
This function does not support all the crs yet.

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[changliao1025]

pre-commit.ci autofix

[changliao1025]

Format the code to remove whitespaces.

[changliao1025]

The existing failings are unrelated to the newly added feature.

[lgolston]

Note the docstring (for the new gallery example) is from a previous example, needs updating

[lgolston]

Can you also comment on which crs the function is working for? The example (https://output.circle-artifacts.com/output/job/5241a971-4eeb-4915-82f3-ba69c3cacb35/artifacts/0/docs/build/html/gallery/miscellanea/zebra_frame.html#sphx-glr-gallery-miscellanea-zebra-frame-py) shows InterruptedGoodeHomolosine and PlateCarree, but the former appears to be having issues.

[changliao1025]

I will test the full list of crs in the new commit and provide the supported crs list.