[FL-1720] BLE GUI refactoring (#678)

* dialog_ex: add clean method, fix documentation
* application: add bt debug and settings application
* bt: add debug application
* bt: add settings application
* bt: rework bt service
* bt debug: fix carrier debug app
* assets: add debug animation to main menu
* bt debug: fix bt packet test
* bt service: rework bt service
* bt: cleanup
* Assets: fix spelling
* Ble: wait for core 2 startup complete before initializing radio stack.
* Accessor: remove dead code, switch port PA6 to PA4, because interrupt line 6 is used by down button.
* FuriHal: assert interrupt line on add_int_callback.
* Bt: update icon on core2 startup complete.

Co-authored-by: あく <alleteam@gmail.com>

applications/bt/bt_service/bt.c

@@ -0,0 +1,74 @@
+#include "bt_i.h"
+
+#define BT_SERVICE_TAG "BT"
+
+// static void bt_update_statusbar(void* arg) {
+//     furi_assert(arg);
+//     Bt* bt = arg;
+//     BtMessage m = {.type = BtMessageTypeUpdateStatusbar};
+//     furi_check(osMessageQueuePut(bt->message_queue, &m, 0, osWaitForever) == osOK);
+// }
+
+static void bt_draw_statusbar_callback(Canvas* canvas, void* context) {
+    canvas_draw_icon(canvas, 0, 0, &I_Bluetooth_5x8);
+}
+
+static ViewPort* bt_statusbar_view_port_alloc() {
+    ViewPort* statusbar_view_port = view_port_alloc();
+    view_port_set_width(statusbar_view_port, 5);
+    view_port_draw_callback_set(statusbar_view_port, bt_draw_statusbar_callback, NULL);
+    view_port_enabled_set(statusbar_view_port, false);
+    return statusbar_view_port;
+}
+
+Bt* bt_alloc() {
+    Bt* bt = furi_alloc(sizeof(Bt));
+    // Load settings
+    if(!bt_settings_load(&bt->bt_settings)) {
+        bt_settings_save(&bt->bt_settings);
+    }
+    // Alloc queue
+    bt->message_queue = osMessageQueueNew(8, sizeof(BtMessage), NULL);
+
+    // doesn't make sense if we waiting for transition on service start
+    // bt->update_status_timer = osTimerNew(bt_update_statusbar, osTimerPeriodic, bt, NULL);
+    // osTimerStart(bt->update_status_timer, 4000);
+
+    // Setup statusbar view port
+    bt->statusbar_view_port = bt_statusbar_view_port_alloc();
+    // Gui
+    bt->gui = furi_record_open("gui");
+    gui_add_view_port(bt->gui, bt->statusbar_view_port, GuiLayerStatusBarLeft);
+
+    return bt;
+}
+
+int32_t bt_srv() {
+    Bt* bt = bt_alloc();
+    furi_record_create("bt", bt);
+    furi_hal_bt_init();
+
+    if(bt->bt_settings.enabled) {
+        if(!furi_hal_bt_wait_startup()) {
+            FURI_LOG_E(BT_SERVICE_TAG, "Core2 startup failed");
+        } else {
+            view_port_enabled_set(bt->statusbar_view_port, true);
+            bool bt_app_started = furi_hal_bt_start_app();
+            if(!bt_app_started) {
+                FURI_LOG_E(BT_SERVICE_TAG, "BT App start failed");
+            } else {
+                FURI_LOG_I(BT_SERVICE_TAG, "BT App started");
+            }
+        }
+    }
+
+    BtMessage message;
+    while(1) {
+        furi_check(osMessageQueueGet(bt->message_queue, &message, NULL, osWaitForever) == osOK);
+        if(message.type == BtMessageTypeUpdateStatusbar) {
+            // Update statusbar
+            view_port_enabled_set(bt->statusbar_view_port, furi_hal_bt_is_alive());
+        }
+    }
+    return 0;
+}