LED strip control subsystem

[KingoftheFlame]

Create a subsystem that controls the robot's LEDs. This should have both aesthetic designs for when the robot is disabled, and it should also include practical designs for communicating to human players.

[oldolph]

Use Spark motor controller https://first.wpi.edu/wpilib/allwpilib/docs/release/java/edu/wpi/first/wpilibj/motorcontrol/Spark.html