- Created a new module `utils/__init__.py` to consolidate utility imports.
- Added `event_map.py` for mapping apnea event types to numerical values and colors.
- Implemented various filtering functions in `filter_func.py`, including Butterworth, Bessel, downsampling, and notch filters.
- Developed `operation_tools.py` for dataset configuration loading, event mask generation, and signal processing utilities.
- Introduced `split_method.py` for segmenting data based on movement and amplitude criteria.
- Added `statistics_metrics.py` for calculating amplitude metrics and generating confusion matrices.
- Included a new Excel file for additional data storage.
