Add interface to `nwm_client_new` for Azure Blob Storage

[jarq6c]

Adds a concrete interface for accessing NWM files on Azure Blob Storage.

Additions

AzureFileCatalog class for discovering files on Azure Blob Storage. Inherits from NWMFileCatalog.

Removals

• None

Changes

• Added example to README.md.

Testing

1. Added basic tests commensurate with other concrete implementations of NWMFileCatalog.

Notes

• None

Todos

• None

Checklist

• [x] PR has an informative and human-readable title
• [x] PR is well outlined and documented. See #12 for an example
• [x] Changes are limited to a single goal (no scope creep)
• [x] Code can be automatically merged (no conflicts)
• [x] Code follows project standards (see CONTRIBUTING.md)
• [x] Passes all existing automated tests
• [x] Any change in functionality is tested
• [x] New functions are documented (with a description, list of inputs, and expected output) using numpy docstring formatting
• [ ] Placeholder code is flagged / future todos are captured in comments
• [x] Reviewers requested with the Reviewers tool :arrow_right:

[jarq6c]

Closes #235

[jarq6c]

Thanks @christophertubbs !

[jarq6c]

Passes all tests. Heeded advice for more explicit URL handling, but used our own handling from _restclient.

[jarq6c]

Deployed: https://pypi.org/project/hydrotools.nwm-client-new/7.3.0/