add sdd smoothing

[talf301]

Default behaviour when you try to smooth an sdd: return a smoothed structlogiccircuit.

[codecov]

Codecov Report

Merging #81 (c800a3a) into master (7da233e) will decrease coverage by 1.45%.
The diff coverage is 75.20%.

❗ Current head c800a3a differs from pull request most recent head 52acf9a. Consider uploading reports for the commit 52acf9a to get more accurate results

@@            Coverage Diff             @@
##           master      #81      +/-   ##
==========================================
- Coverage   88.54%   87.09%   -1.46%     
==========================================
  Files          30       30              
  Lines        2681     2658      -23     
==========================================
- Hits         2374     2315      -59     
- Misses        307      343      +36     

Impacted Files	Coverage Δ
src/LoadSave/data_loaders.jl	47.82% <ø> (ø)
src/Utils/misc.jl	86.88% <ø> (-3.74%)	⬇️
src/Utils/data.jl	81.66% <72.32%> (-4.45%)	⬇️
src/Utils/graphs.jl	93.05% <100.00%> (+0.40%)	⬆️
src/sdd/sdd_functions.jl	99.09% <100.00%> (+0.04%)	⬆️
src/Utils/cubitvector.jl	33.33% <0.00%> (-16.67%)	⬇️
src/queries/satisfies.jl	62.24% <0.00%> (-14.29%)	⬇️
src/queries/satisfies_flow.jl	46.95% <0.00%> (-4.79%)	⬇️
src/bit_circuit.jl	81.13% <0.00%> (-1.89%)	⬇️

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