Implement Snapshot Tracer

[leowrites]

Proposed Changes

• Add a context manager python_ta.debug.SnapshotManager

Type of Change

(Write an X or a brief description next to the type or types that best describe your changes.)

Type	Applies?
🚨 Breaking change (fix or feature that would cause existing functionality to change)
✨ New feature (non-breaking change that adds functionality)	x
🐛 Bug fix (non-breaking change that fixes an issue)
♻️ Refactoring (internal change to codebase, without changing functionality)
🚦 Test update (change that only adds or modifies tests)	x
📚 Documentation update (change that only updates documentation)	x
📦 Dependency update (change that updates a dependency)
🔧 Internal (change that only affects developers or continuous integration)

Checklist

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Questions and Comments

(Include any questions or comments you have regarding your changes.)

[david-yz-liu]

@leowrites good work. In this first review, I focused on the API of SnapshotManager as well as some high-level comments to improve the test file. Make sure to also update the documentation accordingly, which I'll review more closely after you've addressed these comments.

[david-yz-liu]

@leowrites okay great work. I only have one comment left, which is to pin the memory_viz_version argument as well (to make the tests robust against future MemoryViz library updates).