[Keymap] add 2 custom leds to handwired/jotanck (#6042)

* add JOTANCK_LED1&2

* set BACKLIGHT_ENABLE = no

* add 2 custom leds

* swap custom led pins 1&2

* readme update

* update default keymap

keyboards/handwired/jotanck/jotanck.c

@@ -1,6 +1,10 @@
 #include "jotanck.h"
 
 void matrix_init_kb(void) {
+  matrix_init_user();
+}
 
-	matrix_init_user();
+void keyboard_pre_init_user() {
+  setPinOutput(JOTANCK_LED1);
+  setPinOutput(JOTANCK_LED2);
 }