added default CacheAdapter lifecycle hook

[zilto]

This follows a similar logic to hamilton.plugins.h_diskcache, but uses the standard shelve library. It has the same API as the diskcache, but provides less utilities to manage cache size.

Changes

• added a CacheAdapter to hamilton.lifecycle.default
• added relevant tests, derived from tests/plugins/h_diskcache

How I tested this

• ran tests successfully locally

Notes

• one edge case regarding cache history is mentioned in TODOs, but it shouldn't affect usability.

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]

@zilto this should have a companion example, and also docs entry.

[elijahbenizzy]

Looks good! A few comments to fix after, merging.

[elijahbenizzy]

For afterwards -- we may want to make this a set? Odds are high this is not a slow operation, but it could get O(n**2) which we don't want.