Enforce maintaining consistent ordering between builds

[ascopes]

Uses linked structures to enforce consistent ordering of input files and discovered files during builds.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.11%. Comparing base (afcd0b8) to head (edcb01f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #104      +/-   ##
==========================================
+ Coverage   84.09%   84.11%   +0.03%     
==========================================
  Files          23       23              
  Lines         735      736       +1     
  Branches       52       52              
==========================================
+ Hits          618      619       +1     
  Misses         92       92              
  Partials       25       25              

Files	Coverage Δ
...tobufmavenplugin/generate/SourceCodeGenerator.java	98.42% <100.00%> (ø)
...rotobufmavenplugin/source/ProtoSourceResolver.java	78.34% <100.00%> (+0.37%)	⬆️