Leader key implementation (#326)

* implements leader key for planck experimental

* allows override of leader timeout

* adds ability to use the leader key in seq

* fixes leader keycode

* adds chording prototype

* fixes keycode detection

* moves music mode to quantum.c

* disables chording by default

* updates process_action functions to return bool

1 files changed, 5 insertions, 3 deletions

diff --git a/keyboard/planck/planck.c b/keyboard/planck/planck.c
index 446353dbf..da7b3a170 100644
--- a/keyboard/planck/planck.c
+++ b/keyboard/planck/planck.c
@@ -7,7 +7,9 @@ __attribute__ ((weak))
 void matrix_scan_user(void) {}
 
 __attribute__ ((weak))
-void process_action_user(keyrecord_t *record) {}
+bool process_action_user(keyrecord_t *record) {
+    return true;
+}
 
 __attribute__ ((weak))
 void led_set_user(uint8_t usb_led) {}
@@ -32,8 +34,8 @@ void matrix_scan_kb(void) {
         matrix_scan_user();
 }
 
-void process_action_kb(keyrecord_t *record) {
-        process_action_user(record);
+bool process_action_kb(keyrecord_t *record) {
+        return process_action_user(record);
 }
 
 void led_set_kb(uint8_t usb_led) {