Add coupling ratio

[AngleSideAngle]

Because of the way swerve modules are designed, the rotation of a module's turn motor affects the rotation of a drive motor. This is negligible for control, but affects wheel odometry.

From ctre swerve code

For a typical swerve module, the azimuth turn motor also drives the wheel a nontrivial amount, which affects the accuracy of odometry and control. This ratio represents the number of rotations of the drive motor caused by a rotation of the azimuth.

For an implementation, see ctre swerve. This should be done in our SwerveModule class, since it applies to all max swerve modules.

[Yxhej]

Implemented in code, must figure out coupling ratio; keeping open as reminder.