Starts a workout. The value parameter is the amount of whatever unit you place. For example 200 cal, 10 min, or 1 hr
startWorkout(workout: <#Workout Type#>, open: <#Boolean#>, value: <#String (No Variables)#>, unit: <#Workout Unit#>)
startWorkout(workout: "Outdoor Walk", open: false, value: "200", unit: cal)