[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/system/updater/updater_i.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include "views/updater_main.h"
+#include "util/update_task.h"
+
+#include <furi.h>
+#include <gui/gui.h>
+#include <gui/view_stack.h>
+#include <gui/view_dispatcher.h>
+#include <gui/modules/popup.h>
+#include <gui/scene_manager.h>
+#include <gui/modules/widget.h>
+#include <storage/storage.h>
+#include <notification/notification_app.h>
+#include <update_util/update_operation.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define UPDATER_APP_TICK 500
+
+typedef enum {
+    UpdaterViewMain,
+    UpdaterViewWidget,
+} UpdaterViewEnum;
+
+typedef enum {
+    UpdaterCustomEventUnknown,
+    UpdaterCustomEventStartUpdate,
+    UpdaterCustomEventRetryUpdate,
+    UpdaterCustomEventCancelUpdate,
+    UpdaterCustomEventSdUnmounted,
+} UpdaterCustomEvent;
+
+typedef struct UpdaterManifestProcessingState {
+    UpdateManifest* manifest;
+    string_t message;
+    bool ready_to_be_applied;
+} UpdaterManifestProcessingState;
+
+typedef struct {
+    // GUI
+    Gui* gui;
+    NotificationApp* notification;
+    SceneManager* scene_manager;
+    ViewDispatcher* view_dispatcher;
+    Storage* storage;
+
+    UpdaterMainView* main_view;
+
+    UpdaterManifestProcessingState* pending_update;
+    UpdatePrepareResult preparation_result;
+
+    UpdateTask* update_task;
+    Widget* widget;
+    string_t startup_arg;
+    int32_t idle_ticks;
+} Updater;
+
+Updater* updater_alloc(const char* arg);
+
+void updater_free(Updater* updater);
+
+#ifdef __cplusplus
+}
+#endif