Add no_scaling option

[sshin23]

This change allows disabling the autoscaling of NLP

[codecov]

Codecov Report

Merging #56 (191adc6) into master (2a3e11a) will increase coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
+ Coverage   87.23%   87.37%   +0.14%     
==========================================
  Files          28       28              
  Lines        3016     3018       +2     
==========================================
+ Hits         2631     2637       +6     
+ Misses        385      381       -4     

Impacted Files	Coverage Δ
src/interiorpointsolver.jl	93.44% <100.00%> (+0.01%)	⬆️
lib/MadNLPHSL/src/ma86.jl	84.61% <0.00%> (+3.84%)	⬆️
lib/MadNLPHSL/src/ma97.jl	83.67% <0.00%> (+4.08%)	⬆️

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