updates manifest description. bit of code refactoring

[santisq]

resolves #42

[codecov]

Codecov Report

Attention: Patch coverage is 93.87755% with 3 lines in your changes missing coverage. Please review.

Project coverage is 95.23%. Comparing base (74d6ac3) to head (dcdb5b4).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/PSParallelPipeline/Extensions.cs	90.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #43      +/-   ##
==========================================
+ Coverage   94.16%   95.23%   +1.07%     
==========================================
  Files          11       11              
  Lines         497      504       +7     
  Branches       30       30              
==========================================
+ Hits          468      480      +12     
+ Misses         25       20       -5     
  Partials        4        4              

Flag	Coverage Δ
PS-5.1	95.73% <100.00%> (+1.17%)	⬆️
PS-7_Linux	94.44% <93.87%> (+0.27%)	⬆️
PS-7_Windows	94.73% <100.00%> (+0.16%)	⬆️

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