Implement getters for RSOCtoPSD

[blegat]

See #750

[codecov-io]

Codecov Report

Merging #765 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #765      +/-   ##
==========================================
+ Coverage   94.33%   94.33%   +<.01%     
==========================================
  Files          57       57              
  Lines        6226     6235       +9     
==========================================
+ Hits         5873     5882       +9     
  Misses        353      353

Impacted Files	Coverage Δ
src/Bridges/Constraint/soc_to_psd.jl	100% <100%> (ø)	⬆️
src/Bridges/Constraint/functionize.jl	95% <0%> (ø)	⬆️
src/Bridges/Constraint/interval.jl	86.84% <0%> (ø)	⬆️
src/Bridges/Constraint/det.jl	98.73% <0%> (ø)	⬆️
src/Bridges/Constraint/slack.jl	93.54% <0%> (ø)	⬆️
src/Bridges/Constraint/geomean.jl	100% <0%> (ø)	⬆️

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