Add ability to predefine tap dance in config.h or similar
Right now, you're not able to use QMK tap-dance with Vial dynamic tap-dance. You can disable Vial tap-dance functions in vial.c/vial.h and use the QMK tap-dance but not both at the same time.
If you try to compile as-is with your own QMK tap-dance functions, it will fail to compile. (refer to image)