Cross talk correction code for build_evt()

[tdixon97]

This contains code to cross talk correct the energies inside the evt tier. The underlying operations are performed in the evt/modules/cross_talk.py module acting on awkward arrays. The correction is applied recursively in a simple way to GERDA.

• basic implementation
• unit tests
• handling of logic of negative pulses (arbitary)
• positive polarity cross talk
• format energies to allow matrix solution
• fast (matrix algebra) implementation
• function to compute multiplicity

[codecov]

Codecov Report

Attention: Patch coverage is 47.84946% with 97 lines in your changes are missing coverage. Please review.

Project coverage is 50.09%. Comparing base (daa9530) to head (18c32c3).
Report is 17 commits behind head on main.

Files	Patch %	Lines
src/pygama/evt/modules/xtalk.py	62.28%	43 Missing ⚠️
src/pygama/evt/modules/geds.py	0.00%	28 Missing ⚠️
src/pygama/hit/build_hit.py	7.14%	26 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #572      +/-   ##
==========================================
+ Coverage   50.05%   50.09%   +0.03%     
==========================================
  Files          63       59       -4     
  Lines        7581     7749     +168     
==========================================
+ Hits         3795     3882      +87     
- Misses       3786     3867      +81     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.