lv_action_t added independently from lv_btn, page rel/pr action added, lv_app_kb basics

lv_obj/lv_dispi.h

@@ -35,6 +35,15 @@ typedef struct
     uint8_t long_press_sent :1;
 }lv_dispi_t;
 
+
+typedef enum
+{
+	LV_ACTION_RES_OK = 0,
+	LV_ACTION_RES_INV = 0,
+}lv_action_res_t;
+
+typedef lv_action_res_t ( * lv_action_t) (struct __LV_OBJ_T * obj, lv_dispi_t * dispi);
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/