[FL-2627] Flipper applications: SDK, build and debug system (#1387)

* Added support for running applications from SD card (FAPs - Flipper Application Packages)
* Added plugin_dist target for fbt to build FAPs
* All apps of type FlipperAppType.EXTERNAL and FlipperAppType.PLUGIN are built as FAPs by default
* Updated VSCode configuration for new fbt features - re-deploy stock configuration to use them
* Added debugging support for FAPs with fbt debug & VSCode
* Added public firmware API with automated versioning

Co-authored-by: hedger <hedger@users.noreply.github.com>
Co-authored-by: SG <who.just.the.doctor@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/debug/bt_debug_app/bt_debug_app.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <furi.h>
+#include <gui/gui.h>
+#include <gui/view.h>
+#include <gui/view_dispatcher.h>
+#include <dialogs/dialogs.h>
+
+#include <gui/modules/submenu.h>
+#include "views/bt_carrier_test.h"
+#include "views/bt_packet_test.h"
+#include <bt/bt_settings.h>
+
+typedef struct {
+    BtSettings settings;
+    Gui* gui;
+    ViewDispatcher* view_dispatcher;
+    Submenu* submenu;
+    BtCarrierTest* bt_carrier_test;
+    BtPacketTest* bt_packet_test;
+} BtDebugApp;
+
+typedef enum {
+    BtDebugAppViewSubmenu,
+    BtDebugAppViewCarrierTest,
+    BtDebugAppViewPacketTest,
+} BtDebugAppView;