Adding option to set n_threads for Whisper.cpp

[raivisdejus]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.48%. Comparing base (5d83950) to head (23e39b0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #892   +/-   ##
=======================================
  Coverage   82.48%   82.48%           
=======================================
  Files          85       85           
  Lines        4681     4683    +2     
=======================================
+ Hits         3861     3863    +2     
  Misses        820      820           

Flag	Coverage Δ
Linux	82.14% <100.00%> (-0.04%)	⬇️
macOS	82.36% <100.00%> (+<0.01%)	⬆️

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