Incorrect handedness since qmk 0.24.0

[zhyu]

The default behavior of SPLIT_HAND_MATRIX_GRID has been changed in qmk/qmk_firmware#22775.

We need to define SPLIT_HAND_MATRIX_GRID_LOW_IS_LEFT to make keyball works with qmk 0.24.0.

[koron]

Currently, there are no reasons to use QMK 0.24.x.
So we won't do it now.

Of course, if we find out the benefits of going to 0.24 or higher, we'll do it then.

[koron]

There are no plans to respond at this time, so I close the issue.

Please let me know and re-open this if there are any benefits for 0.24 or later.