Make sure we don't publish entrypoints with incompatible dill versions

[WillEngler]

Fixes #357.

Overview

• Pins dill version in poetry.toml
• Aborts publication if we see that an environment created from a notebook/script has the wrong version of dill

Testing

I confirmed that raising the dill error works as suspected for a notebook with and without the right version of dill.

Documentation

None

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:books: Documentation preview :books:: https://garden-ai--368.org.readthedocs.build/en/368/

[codecov-commenter]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (bb7f1a0) 76.79% compared to head (1a09f3b) 76.62%. Report is 1 commits behind head on main.

Files	Patch %	Lines
garden_ai/scripts/save_session_and_metadata.py	0.00%	5 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #368 +/- ## ========================================== - Coverage 76.79% 76.62% -0.17% ========================================== Files 42 42 Lines 2275 2280 +5 ========================================== Hits 1747 1747 - Misses 528 533 +5 ```

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