Added Robin's errr package to prepare for better exception handling

[Helveg]

Describe the work done

My package makes it easy to pass along detailed information with exceptions, something we can use in the NEURON adapter (https://github.com/dbbs-lab/bsb/issues/50). Currently I've only used it to collapse the exception tree by a 3-fold but on the simulation-recorders branch I will need it for other things.

[codecov]

Codecov Report

Merging #82 into master will decrease coverage by 0.38%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      dbbs-lab/bsb-core#82      +/-   ##
==========================================
- Coverage   63.44%   63.06%   -0.39%     
==========================================
  Files          64       64              
  Lines        7348     7272      -76     
==========================================
- Hits         4662     4586      -76     
  Misses       2686     2686              

Impacted Files	Coverage Δ
bsb/exceptions.py	100.00% <100.00%> (ø)

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