[FL-1363] BLE GUI tests (#505)

* bt: introduce bt CLI commands

* api-hal-bt: add get rssi

* bt: fix cli commands

* bt: fix typos

* bt: refacrote bt test names

* ble gui continue

* bt: rework carrier test gui

* bt: rework send packets test gui

* bt: rework receive packets test

* api-hal-bt: change rssi return

* bt: refactore bt gui

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
Co-authored-by: SG <who.just.the.doctor@gmail.com>

firmware/targets/f5/api-hal/api-hal-bt.c

@@ -118,7 +118,7 @@ float api_hal_bt_get_rssi() {
     uint8_t agc = rssi_raw[2] & 0xFF;
     int rssi = (rssi_raw[1] << 8 & 0xFF00) + (rssi_raw[1] & 0xFF);
     if(rssi == 0 || agc > 11) {
-        val = 127;
+        val = -127.0;
     } else {
         val = agc * 6.0f - 127.0f;
         while(rssi > 30) {