Additional policy simulations

[jdebacker]

This PR adds a notebook that includes simulations for the 2024 presidential candidates.

Also, the environment.yml is updated to use a more recent Tax-Calculator version, which is necessary given changes in parameter names.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 49.37%. Comparing base (10985c1) to head (ce5c661).
Report is 31 commits behind head on main.

Files with missing lines	Patch %	Lines
iot/inverse_optimal_tax.py	0.00%	11 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (10985c1) and HEAD (ce5c661). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (10985c1)	HEAD (ce5c661)
unittests	3	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #32       +/-   ##
===========================================
- Coverage   72.81%   49.37%   -23.45%     
===========================================
  Files           3        3               
  Lines         103      160       +57     
===========================================
+ Hits           75       79        +4     
- Misses         28       81       +53     

Flag	Coverage Δ
unittests	49.37% <0.00%> (-23.45%)	⬇️

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