Add aggregate convergence plot, averaging over benchmark problems

[mpetrosian]

No description provided.

[codecov]

Codecov Report

Merging #441 (e1de9c6) into main (70fc19d) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #441      +/-   ##
==========================================
+ Coverage   92.84%   92.86%   +0.02%     
==========================================
  Files         242      244       +2     
  Lines       18472    18497      +25     
==========================================
+ Hits        17150    17177      +27     
+ Misses       1322     1320       -2     

Impacted Files	Coverage Δ
src/estimagic/visualization/profile_plot.py	90.24% <ø> (ø)
src/estimagic/visualization/deviation_plot.py	100.00% <100.00%> (ø)
tests/visualization/test_deviation_plot.py	100.00% <100.00%> (ø)
src/estimagic/__init__.py	100.00% <0.00%> (+8.33%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.