Add minres factor analysis

[eribean]

Minimum residual factor analysis was added

from RyStats.factoranalysis import minres_factor_analysis

Minimum residual factor analysis is equivalent to unweighted least squares factor analysis link

[codecov-commenter]

Codecov Report

Merging #20 (6c7f6b2) into main (4efa0d1) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #20   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           32        33    +1     
  Lines          973      1000   +27     
=========================================
+ Hits           973      1000   +27     

Impacted Files	Coverage Δ
factoranalysis/__init__.py	100.00% <100.00%> (ø)
factoranalysis/minimum_residual.py	100.00% <100.00%> (ø)

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