What's changing

Adds a checkbox whether the model from the dropdown is local or from HF.
Adds a function to load saved local model.

Closes #41

How to test it

Steps to test the changes:

1. pip install -e .
2. python src/speech_to_text_finetune/finetune_whisper.py (finetune a model first)
3. Add in transcribe_app.py your local model dir
4. python demo/transcribe_app.py
5. Select local model dir + click the local checkbox
6. Load model and test transcribing

Additional notes for reviewers

PR #18 enables adding your own model (local or HF) through the UI, instead of having to manually add it in the code.

I already...

• Tested the changes in a working environment to ensure they work as expected
• Added some tests for any new functionality
• Updated the documentation (both comments in code and under /docs)