Create Nerf Launcher control page - Zombie tower

[dannystaple]

Create a nerf Launcher manual control page for manual tackling the Zombie tower.

This should have two joysticks, one for motors, and one for the nerf pan/tilt.
It should have a button to enable the rollers, and a button to fire.

It should use MQTT to talk to the Yukon service, to control the nerf turret.
The back button should stop rollers and detach all servo motors.

This will not use a camera view.

Definition of ready

• Adapt the nerf launcher #28
• Add the MQTT launcher to services on the robot #37

Definition of done

• Inkscape app screen mock up in Git with a rough design for the controls
• PR merged with a page that can drive the robot, aim and fire the launcher mechanism