Addition of vertexing performance tools

[jmw464]

Summary

This pull request introduces the following changes

• Adds additional functionality to perform vertexing performance studies using outputs from GN2/GN2X auxiliary tasks.

Conformity

• [x] Changelog entry
• [x] Documentation

[codecov[bot]]

Codecov Report

Attention: 31 lines in your changes are missing coverage. Please review.

Comparison is base (126d210) 97.27% compared to head (8bdafe8) 96.88%.

:exclamation: Current head 8bdafe8 differs from pull request most recent head 898023a. Consider uploading reports for the commit 898023a to get more accurate results

Files	Patch %	Lines
puma/utils/generate.py	5.55%	17 Missing :warning:
puma/var_vs_aux.py	90.56%	10 Missing :warning:
puma/hlplots/aux_results.py	96.34%	3 Missing :warning:
puma/tests/hlplots/test_aux_results.py	98.57%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #216 +/- ## ========================================== - Coverage 97.27% 96.88% -0.40% ========================================== Files 35 41 +6 Lines 3412 3946 +534 ========================================== + Hits 3319 3823 +504 - Misses 93 123 +30 ```

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[dkobylianskii]

Hi @jmw464 ,

Thanks a lot for this MR, it looks nice. Few comments:

• Could you please modify tests a bit, so we will have comparisons with expected_plot, like here https://github.com/umami-hep/puma/blob/main/puma/tests/test_var_vs_var.py#L207
• Could you also add file with usage example and, if possible, some documentation?