feat: replace fairseq with transformers

[34j]

Closes #142, Closes #198

[codecov-commenter]

Codecov Report

Merging #385 (bf906a3) into main (6cab9af) will increase coverage by 0.14%.
The diff coverage is 42.85%.

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@@            Coverage Diff             @@
##             main     #385      +/-   ##
==========================================
+ Coverage   20.15%   20.30%   +0.14%     
==========================================
  Files          38       38              
  Lines        3294     3280      -14     
  Branches      438      440       +2     
==========================================
+ Hits          664      666       +2     
+ Misses       2612     2596      -16     
  Partials       18       18              

Impacted Files	Coverage Δ
src/so_vits_svc_fork/gui.py	0.00% <0.00%> (ø)
src/so_vits_svc_fork/inference/core.py	18.85% <0.00%> (ø)
...its_svc_fork/preprocessing/preprocess_hubert_f0.py	34.78% <33.33%> (ø)
src/so_vits_svc_fork/utils.py	21.98% <46.66%> (+0.67%)	⬆️
src/so_vits_svc_fork/__init__.py	100.00% <100.00%> (ø)

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