8ab934fe1c
- Modify `build_features` function to support iterative processing across nested directories, enhancing the system's ability to handle larger datasets and varied input structures. - Replace direct usage of `FeatureExtractor` class with `ExtractTimeFeatures` function, which now acts as a wrapper to include this class, facilitating streamlined integration and maintenance of feature extraction processes. - Implement `extract_numbers` function using regex to parse filenames and extract numeric identifiers, used for labels when training with SVM - Switch output from `.npz` to `.csv` format in `build_features`, offering better compatibility with data analysis tools and readability. - Update documentation and comments within the code to reflect changes in functionality and usage of the new feature extraction setup. Closes #4
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