Finished ML model selection and testing - A pretrained audio-classification model YAMnet https://huggingface.co/STMicroelectronics/yamnet

For now, we use the three classes - smoke_alarm, glass_break, and fall_thud as the "danger" labels, the others are normal

Model ran successfully on our laptops, but the arduino board is still setting up on the app lab. We're aiming to deploy on the board ASAP