organizing classes and functions

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 74.46809% with 12 lines in your changes missing coverage. Please review.

Project coverage is 70.31%. Comparing base (8a24965) to head (9acebc1).

Files	Patch %	Lines
...dio/tasks/features_extraction/praat_parselmouth.py	0.00%	6 Missing :warning:
...selab/audio/tasks/speech_to_text/speech_to_text.py	0.00%	3 Missing :warning:
...enselab/audio/tasks/voice_cloning/voice_cloning.py	0.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #57 +/- ## ========================================== + Coverage 68.75% 70.31% +1.56% ========================================== Files 35 28 -7 Lines 912 896 -16 ========================================== + Hits 627 630 +3 + Misses 285 266 -19 ```

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