Add models preferences

[chidiwilliams]

No description provided.

[codecov]

Codecov Report

Merging #421 (35ba19d) into main (0a4be2b) will increase coverage by 0.26%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##             main     #421      +/-   ##
==========================================
+ Coverage   80.27%   80.54%   +0.26%     
==========================================
  Files          25       28       +3     
  Lines        2150     2323     +173     
==========================================
+ Hits         1726     1871     +145     
- Misses        424      452      +28     

Flag	Coverage Δ
Linux	79.68% <70.88%> (?)
Windows	78.31% <71.97%> (-0.33%)	⬇️
macOS	78.43% <65.50%> (-1.29%)	⬇️

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Impacted Files	Coverage Δ
buzz/transcriber.py	70.98% <33.33%> (-0.34%)	⬇️
buzz/gui.py	77.75% <38.09%> (-1.33%)	⬇️
buzz/model_loader.py	79.50% <76.42%> (+9.16%)	⬆️
buzz/widgets/models_preferences_widget.py	83.14% <83.14%> (ø)
buzz/widgets/model_download_progress_dialog.py	83.33% <83.33%> (ø)
buzz/widgets/model_type_combo_box.py	95.00% <95.00%> (ø)
buzz/widgets/preferences_dialog.py	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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