[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/file_browser_test/file_browser_app_i.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "scenes/file_browser_scene.h"
+
+#include <gui/gui.h>
+#include <gui/view_dispatcher.h>
+#include <gui/scene_manager.h>
+#include <gui/modules/submenu.h>
+#include <gui/modules/file_browser.h>
+#include <dialogs/dialogs.h>
+#include <notification/notification_messages.h>
+#include <gui/modules/variable_item_list.h>
+#include <gui/modules/widget.h>
+
+typedef struct FileBrowserApp FileBrowserApp;
+
+struct FileBrowserApp {
+    Gui* gui;
+    ViewDispatcher* view_dispatcher;
+    SceneManager* scene_manager;
+    DialogsApp* dialogs;
+    Widget* widget;
+    FileBrowser* file_browser;
+
+    string_t file_path;
+};
+
+typedef enum {
+    FileBrowserAppViewStart,
+    FileBrowserAppViewBrowser,
+    FileBrowserAppViewResult,
+} FileBrowserAppView;