Add jupyter notebook version of caching_nodes example

[alti-tude]

Add jupyter notebook version of caching_nodes example #247

Changes

• Add jupyter notebook version of caching_nodes example
• Add "examples/**/hamilton-env" to .gitignore to ignore the autogenerated virtual environments.

How I tested this

Manually ran through the notebook and verified results

Notes

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.

[skrawcz]

@alti-tude see https://github.com/DAGWorks-Inc/hamilton/blob/main/developer_setup.md for setting up pre-commit locally.

Otherwise looking good, thanks!

[alti-tude]

@alti-tude see https://github.com/DAGWorks-Inc/hamilton/blob/main/developer_setup.md for setting up pre-commit locally.

Otherwise looking good, thanks!

Yep. Fixed it. Thanks!

[skrawcz]

Thanks! Merged!