Create a Bangle.isWorn() method

I just gave it a shot yesterday with the Bangle.getHealthStatus().movement method works great! Temperature adds some inference but I included the data as well.

Without temperature, the model has a 99.2% accuracy :)

The decision tree function is:

function isWorn() {
    if (Bangle.isCharging())
        return false;
    if (Bangle.getHealthStatus().movement > 146)
        return true;
    return false;
}