Autonomous mode picker

[bobtseattle]

The drive team will need to tell the robot what the plan is for autonomous mode.
Create an app to allow the drive team to pick various options which will be made
available to the robot via networktables.

This assumes there will be other possible hardcoded stages for each choice.
(ie if next to the trench, pick up more and keep shooting)

//Questions

• Starting position
• Shooting timeframe (when are we allowed to shoot)

Done:

• All above items are checked
• Pull request created
• Pull request approved & merged