Add delete model and show model location options

[chidiwilliams]

No description provided.

[codecov]

Codecov Report

Merging #557 (484ca4c) into main (f1550f8) will decrease coverage by 1.17%.
The diff coverage is 82.62%.

@@            Coverage Diff             @@
##             main     #557      +/-   ##
==========================================
- Coverage   76.96%   75.79%   -1.17%     
==========================================
  Files          34       37       +3     
  Lines        2522     2586      +64     
==========================================
+ Hits         1941     1960      +19     
- Misses        581      626      +45     

Flag	Coverage Δ
Linux	75.79% <82.62%> (-0.90%)	⬇️
Windows	?
macOS	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
buzz/cli.py	0.00% <0.00%> (ø)
...s/preferences_dialog/general_preferences_widget.py	85.96% <ø> (ø)
buzz/widgets/sequence_edit.py	57.89% <57.89%> (ø)
buzz/model_loader.py	69.02% <70.00%> (-16.53%)	⬇️
buzz/gui.py	75.00% <83.33%> (-1.35%)	⬇️
buzz/widgets/menu_bar.py	83.33% <83.33%> (ø)
...ts/preferences_dialog/models_preferences_widget.py	81.81% <83.60%> (ø)
buzz/widgets/about_dialog.py	96.72% <96.72%> (ø)
buzz/widgets/icon.py	100.00% <100.00%> (ø)
buzz/widgets/openai_api_key_line_edit.py	100.00% <100.00%> (ø)
... and 3 more

... and 4 files with indirect coverage changes

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