Poetry Python custom image example

[moose-in-australia]

Issue #, if available: N/A

Description of changes: Adding an example for customers who use Poetry to manage Python environments and dependencies. This example shows how to use your Poetry-defined environment to create a custom image for SageMaker Studio.

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[athewsey]

Just a suggestion: IMO maybe would be good to add the sagemaker SDK to pyproject.toml?

[moose-in-australia]

Thanks for the suggestion! I've added the sagemaker SDK to the environment definition and tested it in Studio.

[jaipreet-s]

Thanks for the contribution!