Automate note pickup using sensors

There will be either two or three sensors between the intake rollers and the shooter subsystem (tbd what the shooter looks like). We need to add logic to the intake based on sensor inputs. The goal is to detect when we have a note entering our intake, and stop the intake motor once we have detected the note. We suspect that the intake will be moving fast enough that the rollers will continue to spin after we've detected the note, so the second/third sensors are there to stop the note from entering into the shooter. We need to keep the note away from the shooter until we're ready to score.

To be confirmed what sensors we are using, where they will be located, and how many will be used. Will update after prototype testing.

Start with the intake requirements in this issue and the planned prototype testing; confirm the sensor types, count, locations, and shooter arrangement before implementation. Done means the intake responds to sensor inputs, stops the intake motor after note detection, and keeps the note out of the shooter until scoring.

Written by the indexing model from the issue text.