refactor(subsystem/drive): add feedforwards config constant and conditional drive function selection

[coderabbitai]

Summary

Add a feedforwards configuration constant for auto/drive. When feedforwards is not enabled (false), fall back to using the normal driveRobotRelative function instead of the PathPlanner-specific drive function.

Context

Identified while reviewing PR #19 when examining the YAGSL example. The current implementation always uses the feedforwards-enabled drive function regardless of configuration, which may not be desirable in all cases.

Tasks

• Add a feedforwards config constant (e.g., in a constants file for auto/drive)
• In the PathPlanner drive consumer, check the feedforwards config constant
• If feedforwards is false, use the normal driveRobotRelative function instead

References

• PR: refactor(subsystem/drive): use the correct drive func for PPL #19
• Comment: refactor(subsystem/drive): use the correct drive func for PPL #19

/cc @Baconing