added Matplotlib data saver

[zilto]

Added a DataSaver to save matplotlib objects of type matplotlib.figure.Figure, i.e., resulting from plt.figure() and plt.subplots().

Changes

Added a matplotlib_extensions.py with the DataSaver class and added it to the registry

How I tested this

Added a test to check the DataSaver properly writes to a file. I manually validated that the output file was correct.

Notes

• The Matplotlib and the Plotly DataSaver accept as path argument objects of type IO (i.e., in-memory files, streams, etc.) which may fail when hamilton.io.utils.get_file_metadata() is called.

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.

[sweep-ai]

Apply Sweep Rules to your PR?

• Apply: All new business logic should have corresponding unit tests.
• Apply: Refactor large functions to be more modular.

[skrawcz]

E AttributeError: module 'matplotlib' has no attribute 'artist'

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