This commit adds a new script `start.sh` that automates the process of processing raw data, building features, and training a model. The script uses Python scripts from the `src` directory to perform these tasks. The processed data is saved in the `data/processed` directory, the feature matrix is saved in the `data/features` directory, and the trained model is saved in the `models` directory.
The purpose of these changes is to streamline the data processing and model training workflow, making it easier to reproduce and iterate on the results.
