Add new plots

[jdebacker]

This PR does 2 things:

1. Adds some additional plots to Simulate_all_policies.ipynb
2. Fixes the plot that decomposes the $g_z$, iot_user.JJZFig4

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 48.76%. Comparing base (10985c1) to head (c3a568c).
Report is 51 commits behind head on main.

Files with missing lines	Patch %	Lines
iot/inverse_optimal_tax.py	66.66%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (10985c1) and HEAD (c3a568c). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (10985c1)	HEAD (c3a568c)
unittests	3	2

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #35       +/-   ##
===========================================
- Coverage   72.81%   48.76%   -24.06%     
===========================================
  Files           3        3               
  Lines         103      162       +59     
===========================================
+ Hits           75       79        +4     
- Misses         28       83       +55     

Flag	Coverage Δ
unittests	48.76% <66.66%> (-24.06%)	⬇️

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