Micro optimizations

[nbollis]

PR Classification

Code optimization and performance improvements.

PR Summary

This pull request focuses on optimizing code performance and improving readability.

• ClassicDeconvolutionAlgorithm.cs: Initialized lists with estimated sizes and optimized charge state handling.
• PpmTolerance.cs: Introduced _factor for precomputed calculations and simplified methods.
• BioPolymerWithSetModsExtensions.cs: Initialized StringBuilder with estimated capacity.
• DigestionProduct.cs: Refactored modification calculations and simplified conditional logic.
• ModificationLocalization.cs: Optimized ModFits and MotifMatches methods for better performance.

[codecov]

Codecov Report

Attention: Patch coverage is 96.77419% with 2 lines in your changes missing coverage. Please review.

Project coverage is 77.21%. Comparing base (6411360) to head (532aaa7).

Files with missing lines	Patch %	Lines
...ib/Omics/Modifications/ModificationLocalization.cs	92.59%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #813   +/-   ##
=======================================
  Coverage   77.21%   77.21%           
=======================================
  Files         218      218           
  Lines       32966    32972    +6     
  Branches     3413     3418    +5     
=======================================
+ Hits        25455    25460    +5     
  Misses       6944     6944           
- Partials      567      568    +1     

Files with missing lines	Coverage Δ
...lution/Algorithms/ClassicDeconvolutionAlgorithm.cs	96.95% <100.00%> (+0.03%)	⬆️
mzLib/MzLibUtil/PpmTolerance.cs	100.00% <100.00%> (ø)
mzLib/Omics/BioPolymerWithSetModsExtensions.cs	95.34% <100.00%> (ø)
mzLib/Omics/Digestion/DigestionProduct.cs	95.65% <100.00%> (+0.87%)	⬆️
...ib/Omics/Modifications/ModificationLocalization.cs	93.02% <92.59%> (-4.48%)	⬇️