refactor: improve Ninapro DB5 with progress indication for data augmentation

refactor: update dataset processing commands and improve script structure

refactor: EMG processing scripts and documentation

fix: add pandas as additional library for EMG pre-processing

Update scripts/README.md

refactor: window size parameter naming and update documentation for clarity

Update scripts/README.md

Update scripts/README.md

Create requirements.txt

Delete scripts/HMC.py

Update scripts/README.md

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