Add Documentation text in README

[rodrigomha]

I also updated the about section

[github-actions]

Performance Results

Version	Precompile Time
Main	2.730369876
This Branch	2.724357546

Version	Run Time
Main-Build ResidualModel	8.599981208
Main-Execute ResidualModel	17.305881935
Main-Build MassMatrixModel	0.708899443
Main-Execute MassMatrixModel	37.7597013
This Branch-Build ResidualModel	8.56307309
This Branch-Execute ResidualModel	17.179931802
This Branch-Build MassMatrixModel	0.689157876
This Branch-Execute MassMatrixModel	36.917990111

ResidualModel and MassMatrixModel performance results should be compared between versions and not between models due to the execution order of the tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.73%. Comparing base (6a070cb) to head (e627c3a).
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #394      +/-   ##
==========================================
- Coverage   87.56%   86.73%   -0.83%     
==========================================
  Files          65       65              
  Lines        9156     9701     +545     
==========================================
+ Hits         8017     8414     +397     
- Misses       1139     1287     +148     

Flag	Coverage Δ
unittests	86.73% <ø> (-0.83%)	⬇️

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see 12 files with indirect coverage changes