Feature: Shooter with feeder

## Description

Add another motor, the feeder, to the Shooter class, and have a function that runs it. Have the function get called in robotpy when some operator button is pressed. This wheel will be less powerful, and should move relatively slowly to nudge the ball into the larger wheel to shoot it.

## Acceptance Test:

Operator holds right trigger and the shooter spins up. Operator presses some button and the ball is moved by the feeder wheel and shot.

### Preconditions:

### Test Script:

## Notes

Start by locating the Shooter class and the robotpy operator-button handling mentioned in the issue. Trace how the existing shooter motor is controlled, then identify the corresponding control path for the feeder. Done means the operator can spin up the shooter with the right trigger and use another button to run the slower feeder so a ball is shot.

Written by the indexing model from the issue text.