Create bpots_decoder.jl

[adhirajj]

This is the Belief Prop decoder with bias using oscillating trapping sets

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 152 lines in your changes missing coverage. Please review.

Project coverage is 46.72%. Comparing base (4c2f97c) to head (619e7f9).

Files with missing lines	Patch %	Lines
src/decoders/bpots_decoder.jl	0.00%	152 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #31       +/-   ##
===========================================
- Coverage   58.96%   46.72%   -12.25%     
===========================================
  Files          14       15        +1     
  Lines         580      732      +152     
===========================================
  Hits          342      342               
- Misses        238      390      +152     

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