DOCS-2084: Add movement sensor and power sensor snippets

[skyleilani]

Is it preferred that the the code snippet for the sensor's Readings() method go in the sensors service's sensors.go file?

[github-actions]

Warning your change may break code samples. If your change modifies any of the following functions please contact @viamrobotics/fleet-management. Thanks!

component	function
base	IsMoving
board	GPIOPinByName
camera	Properties
encoder	Properties
motor	IsMoving
sensor	Readings
servo	Position
arm	EndPosition
audio	MediaProperties
gantry	Lengths
gripper	IsMoving
input_controller	Controls
movement_sensor	LinearAcceleration
power_sensor	Power
pose_tracker	Poses
motion	GetPose
vision	ClassificationsFromCamera

[npentrel]

This looks good to me aside from the whitespace. For where to place the readings description you'll have to ask the SME reviewer because I'm not sure

[penguinland]

Where does stuff about Readings go?

It should go in the Sensor interface, rather than being copied between MovementSensor, PowerSensor, etc. That's the DRY (Don't Repeat Yourself) approach, so that if the Sensor interface ever changes, you only need to update that and everything else just points to the updated version.

My feedback is extremely minor, and the rest LGTM!