better support for non-protein residues in ResidueContribution plots

[lmiq]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.51%. Comparing base (6616813) to head (87699a8).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/tools/residue_contributions.jl	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #53      +/-   ##
==========================================
+ Coverage   89.49%   89.51%   +0.01%     
==========================================
  Files          25       25              
  Lines        1676     1688      +12     
==========================================
+ Hits         1500     1511      +11     
- Misses        176      177       +1     

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