Kalman Cleanup And Activity Rec Prep

• Documentation and transformation cleanup for Kalman classes
• Introduce One-Hot data handling for activity recognition
• Rework estimator structure to "run-thread-calls" for clearer inheritance and more intuitive example scripts

Phone Mode Updates

• Updated Kalman model for Pocket mode
• Enabled stochastic forward passes for the Upper Arm mode. The old one is moved to experimental scripts as "raw_upper_arm".
• Fixed pip-install bug where the kalman model is not copied to the target directory

Phone Pocket handling

• Added a Kalman Filter approach to allow free body orientation changes tracked by the phone
• See associated Workshop Paper for this release
• New message structure and new models for old modes

first basic release

• The first basic release provides streaming and record examples for the modes WatchOnly and PhoneUpperArm.
• Additional functionalities remain in the experimental scripts category until they are thoroughly documented and tested