add wareki_face for japanese user (#351)

movement/watch_faces/complication/wareki_face.h

@@ -0,0 +1,34 @@
+#ifndef WAREKI_FACE_H_
+#define WAREKI_FACE_H_
+
+#include "movement.h"
+
+#define REIWA_LIMIT 2018 + 31
+#define REIWA_GANNEN  2019
+#define HEISEI_GANNEN 1989
+
+typedef struct {
+    bool active;
+    uint32_t disp_year;     //Current displayed year 
+    uint32_t start_year;    //Year when this screen was launched
+    uint32_t real_year;     //The actual current year     
+} wareki_state_t;
+
+
+void wareki_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
+void wareki_activate(movement_settings_t *settings, void *context);
+bool wareki_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void wareki_resign(movement_settings_t *settings, void *context);
+void addYear(wareki_state_t* state,int count);
+void subYear(wareki_state_t* state,int count);
+
+#define wareki_face ((const watch_face_t){ \
+    wareki_setup, \
+    wareki_activate, \
+    wareki_loop, \
+    wareki_resign, \
+    NULL, \
+})
+
+#endif // WAREKI_FACE_H_
+