add class: SimulationMacroCache

[SylviaDu99]

WIP: Another version for feat: SimulationMacroCache

targeting to fix: #197

[codecov]

Codecov Report

Attention: Patch coverage is 54.79452% with 33 lines in your changes missing coverage. Please review.

Project coverage is 82.13%. Comparing base (64937e2) to head (e5449e3).
Report is 10 commits behind head on master.

Files	Patch %	Lines
policyengine_core/simulations/sim_macro_cache.py	58.53%	17 Missing ⚠️
policyengine_core/simulations/simulation.py	27.27%	14 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #224      +/-   ##
==========================================
- Coverage   82.56%   82.13%   -0.43%     
==========================================
  Files         187      190       +3     
  Lines        9328     9574     +246     
  Branches     1183     1206      +23     
==========================================
+ Hits         7702     7864     +162     
- Misses       1348     1427      +79     
- Partials      278      283       +5     

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[anth-volk]

Thanks for your contributions to this @SylviaDu99. I've left a couple minor change requests, and it would also be appreciated if you could update your PR description. I'd also like to get Nikhil's review on this, so I've requested his review, as well.

[nikhilwoodruff]

Thanks for this @SylviaDu99! Just a few comments.

[nikhilwoodruff]

Sorry- could you explain why we need this?

[anth-volk]

@SylviaDu99 Thanks again for this, apologies for the delay in reviewing. I requested just one minor change, then I think this should be good to merge.

[anth-volk]

Suggested change

	if hasattr(self, "dataset"):
	if hasattr(self, "dataset") and self.dataset.data_format == Dataset.FLAT_FILE:

I think this is better form instead of nesting if's

[anth-volk]

Thanks for your hard work on this @SylviaDu99!