Added improved decoder code in decode function itself

[krishna-praneet]

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Before considering your pull request ready for review and merging make sure that all of the below are completed:

• The code is properly formatted and commented.
• Substantial new functionality is documented within the docs.
• All new functionality is tested.
• All changes and new functionality are marked in the CHANGELOG file.

[codecov]

Codecov Report

Attention: Patch coverage is 94.23077% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 42.30%. Comparing base (3482b4c) to head (03eef01).

Files	Patch %	Lines
src/decoders/belief_propagation.jl	94.23%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #15      +/-   ##
==========================================
+ Coverage   36.27%   42.30%   +6.03%     
==========================================
  Files          13       13              
  Lines         419      468      +49     
==========================================
+ Hits          152      198      +46     
- Misses        267      270       +3     

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[Krastanov]

Just a few quick questions.

[Krastanov]

Thank you!