Eac/pz informer

[eacharles]

Problem & Solution Description (including issue #)

Added additional input to PzInformer to take truth (in case it isn't in the pz file)
Added PzEstimator class.

Code Quality

• My code follows the code style of this project
• I have written unit tests or justified all instances of #pragma: no cover; in the case of a bugfix, a new test that breaks as a result of the bug has been added
• My code contains relevant comments and necessary documentation for future maintainers; the change is reflected in applicable demos/tutorials (with output cleared!) and added/updated docstrings use the NumPy docstring format
• Any breaking changes, described above, are accompanied by backwards compatibility and deprecation warnings

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.75%. Comparing base (ca3c1d3) to head (c519ada).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #191      +/-   ##
==========================================
+ Coverage   99.01%   99.75%   +0.73%     
==========================================
  Files          46       47       +1     
  Lines        3150     3228      +78     
==========================================
+ Hits         3119     3220     +101     
+ Misses         31        8      -23     

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[ztq1996]

looks good, thanks!