Performance using Pyirf

[gaia-verna]

This PR requires #79 and is related to part of #73. News:

• a script to calculate performance using pyirf (based on ED analysis)
• a notebook to display the performance

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[HealthyPear]

Small spoiler/request before this PR becomes rewieable:

In #76 I have moved all notebooks under docs/contribution/benchmarks.

I would like you to,

• ignore the PSF notebook, which will be updated anyway,
• move the new IRFs/sensitivity notebook where the old one will be (under docs/contribution/benchmarks/DL3) but with a different name (add a suffix like "_new" for example so I can later format it / update it before the next release).

EDIT: I just realized that the new notebook has already "_pyirf" as a suffix, so just move it to the new folder.

[codecov[bot]]

Codecov Report

Merging #83 (db8d430) into master (f0d73e6) will increase coverage by 6.20%. The diff coverage is 24.00%.

@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
+ Coverage   30.78%   36.99%   +6.20%     
==========================================
  Files          20       17       -3     
  Lines        2267     1768     -499     
==========================================
- Hits          698      654      -44     
+ Misses       1569     1114     -455     

Impacted Files	Coverage Δ
protopipe/scripts/make_performance_EventDisplay.py	21.49% <21.49%> (ø)
protopipe/perf/utils.py	25.49% <35.29%> (+5.49%)	:arrow_up:
protopipe/scripts/__init__.py	100.00% <100.00%> (ø)

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