Accelerometer

What's Changed
* Fix/no stationary points by chanshing in https://github.com/OxWearables/biobankAccelerometerAnalysis/pull/221


**Full Changelog**: https://github.com/OxWearables/biobankAccelerometerAnalysis/compare/v6.2.2...v6.2.3

What's Changed
- Fixed missing `--timeShift` support for GENEActiv files.

What's Changed
- Output summary file with all the numerical precision. That is, no more rounding.

What's Changed
- Restructured the model directories & URLs
- Separate Chan's model:
- `--activityModel chan` classifies "sleep", "sedentary", and "other". Then, "other" is split into "light" and "moderate-vigorous" using cutpoints.
- `--activityModel chanw` classifies "sleep", "sedentary", "walking", and "other". Then, "other" split using cutpoints.

What's Changed

* Updated Chan classifier to include "walking". Similar to the previous model, this will first classify "sleep", "sedentary", "walking", and "other". Then, "other" is further split according to ENMO cutpoints (>100mg then "moderate-vigorous", otherwise "light").