Add Google Cloud Storage example

[dstansby]

This adds an example of how to open an array that's in Google Cloud Storage. Fixes zarr-developers/n5py#14

I've added a new section to the docs, "Examples", for short, self-contained examples, that achieve a specific goal. This is distinct from existing sections of the docs, and should complement the existing tutorial and reference sections. For those familiar with Diataxis, this is essentially the "how-to guides" quadrant.

TODO:

• Add unit tests and/or doctests in docstrings
• Add docstrings and API docs for any new/modified user-facing classes and functions
• New/modified features documented in docs/tutorial.rst
• Changes documented in docs/release.rst
• GitHub Actions have all passed
• Test coverage is 100% (Codecov passes)

[d-v-b]

Your example uses N5FSStore, perhaps an example for a wide audience should just use FSStore?

[sanketverma1704]

This line throws an error:

AttributeError: module 'zarr' has no attribute 'FSStore'

[sanketverma1704]

Hi @dstansby, thanks for sending the PR.

I wonder if this example should be listed here along with S3 and Azure examples?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.99%. Comparing base (6fe553d) to head (ad3206f).
Report is 497 commits behind head on main.

Additional details and impacted files

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  Coverage   99.99%   99.99%           
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  Files          38       38           
  Lines       14580    14580           
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  Hits        14579    14579           
  Misses          1        1