add findmy to system apps [ci skip]

autoload by Willy-JL

applications/system/find_my_flipper/findmy_state.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <extra_beacon.h>
+
+#define FINDMY_STATE_HEADER "FindMy Flipper State"
+#define FINDMY_STATE_VER    1
+#define FINDMY_STATE_DIR    EXT_PATH("apps_data/findmy")
+#define FINDMY_STATE_PATH   FINDMY_STATE_DIR "/findmy_state.txt"
+
+#define BATTERY_FULL     0x00
+#define BATTERY_MEDIUM   0x50
+#define BATTERY_LOW      0xA0
+#define BATTERY_CRITICAL 0xF0
+
+typedef enum {
+    FindMyTypeApple,
+    FindMyTypeSamsung,
+    FindMyTypeTile,
+} FindMyType;
+
+typedef struct {
+    bool beacon_active;
+    uint8_t broadcast_interval;
+    uint8_t transmit_power;
+    bool show_mac;
+    uint8_t mac[EXTRA_BEACON_MAC_ADDR_SIZE];
+    uint8_t data[EXTRA_BEACON_MAX_DATA_SIZE];
+    FindMyType tag_type;
+} FindMyState;
+
+bool findmy_state_load(FindMyState* out_state);
+
+void findmy_state_apply(FindMyState* state);
+
+void findmy_state_save_and_apply(FindMyState* state);
+
+uint8_t findmy_state_data_size(FindMyType type);