Custom Combos

[xervon]

This change allows the user to create custom combos.

To facilitate this, I

• added a new option MIRYOKU_CUSTOM_COMBO_COUNT and
• included the file custom_keymap.c from manna-harbour_miryoku.h
• created a stub for custom_keymap.c based on custom_config.h

To define custom combos, set MIRYOKU_CUSTOM_COMBO_COUNT to the amount of combos that are defined and define combos in custom_keymap.c

Example custom_keymap.c:

const uint16_t PROGMEM repeat_home[] = {KC_J, KC_K, COMBO_END};

#define MIRYOKU_CUSTOM_COMBOS \
  COMBO(repeat_home, KC_ESC)

custom_rules.mk:

MIRYOKU_CUSTOM_COMBO_COUNT=1