Feature: Add Turtle Kevux path support.

Feature: Add Turtle Kevux path support.

This does not break API or ABI because it requires macros to be defined that would break it.
These macros, when in use, should not break API (but does extend it) but may break ABI.
The return value may have additional results and might be considered an API but not ABI breaking change.

There is already Kevux-specific code in FLL.
Temporarily continue that process as a short term solution.
In the long term, separate functions or files may be used (or an entirely separate project).