Create FSM for Intake/Shooter subsystem

[AG6GR]

Apply the FSMSystem framework to the Intake/Shooter subsystem. The current intake mechanism consists of a roller on a simple arm deployed with pneumatics. When balls are picked up by the intake, they get rolled onto a conveyor in the center of the robot. This belt serves as storage for picked up balls and rolls balls up a ramp to the shooter wheel.

This subsystem must handle two driver inputs:

• "Intake enable button": When held, the intake arm deploys and starts spinning its roller to pick up balls. The conveyor also starts so incoming balls have somewhere to go.
• "Shooter button": When held, the shooter wheel starts spinning up. When it is at full speed, the conveyor starts feeding balls in to the shooter.