Control over motion alerts and detection
# Feature Request

### Description
<!-- ✍️--> A clear and concise description of the problem or missing capability...
I would love to be able to control whether the camera will send motion alerts to my phone.
I would also love to control whether the camera will detect motion in the first place.
My main objective is to control whether motion alerts will be sent to my phone or not.

### Describe the solution you'd like
<!-- ✍️--> If you have a solution in mind, please describe it.
A method that allows me to enable and disable motion alerts, and a method that allows me to enable and disable motion detection.
Example: camera.motionAlertDetection(false) OR = false
Example: camera.motionDetection(false) OR = false

### Describe alternatives you've considered
<!-- ✍️--> Have you considered any alternative solutions or workarounds?
I have not thought about any workarounds.
I don't know a lot about the API, so if there already is a motion alerts setting, I would love to hear about it!

### Device data
<!-- ✍️-->  If you are requesting a new device be added to homebridge-ring, please follow the instructions in https://github.com/dgreif/ring/wiki/Data-Discovery and include the output here

My testing device is a Ring Doorbell v4.
I will be using a Ring Spotlight Cam as my main device when I am finished with my website.

### Thanks for any help!!!
