Develop a solution for dynamically modifying the sensor configuration

[curieos]

Currently sensors are created by the plant service on initialization:

Firmware/src/plant/plant_service.cpp

Lines 64 to 67 in 881d03b

	PlantService::PlantService(Scheduler *scheduler)
	: Task(CHECK_SENSOR_PERIOD, TASK_FOREVER, scheduler, true) {
	this->ambient_temperature_sensor = new AmbientTemperatureSensor();
	this->ambient_humidity_sensor = new AmbientHumiditySensor();

This should be changed so sensors can be created and destroyed based on the configuration as it changes. A sensor factory is probably a good design pattern to follow. #5 should probably be completed before this so extra work doesn't occur.