ML model

- The current model is a model I made using [Teachable Machine](https://teachablemachine.withgoogle.com/).
- A better model, maybe a custom one built by someone, would be better.
- If any changes to the model are made, please
- make changes to `./model/model.py`.
- make sure that the output format is correct on the output page.
- change `README.md` by removing 'Teachable Machine' from the text. (If the model is built by someone else.)
- add any more details to `CONTRIBUTING.md` for local project setup.

Start by reading ./model/model.py and inspecting the output page to understand the current model interface and required output format. A model replacement is done when the output remains correct; then update README.md as requested and add any local setup details to CONTRIBUTING.md.

Written by the indexing model from the issue text.