[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/services/loader/loader_i.h

@@ -0,0 +1,43 @@
+#include "loader.h"
+
+#include <furi.h>
+#include <furi_hal.h>
+#include <core/pubsub.h>
+#include <cli/cli.h>
+#include <lib/toolbox/args.h>
+
+#include <gui/view_dispatcher.h>
+
+#include <gui/modules/menu.h>
+#include <gui/modules/submenu.h>
+
+#include <applications.h>
+#include <assets_icons.h>
+
+struct Loader {
+    FuriThreadId loader_thread;
+
+    const FlipperApplication* application;
+    FuriThread* application_thread;
+    char* application_arguments;
+
+    Cli* cli;
+    Gui* gui;
+
+    ViewDispatcher* view_dispatcher;
+    Menu* primary_menu;
+    Submenu* plugins_menu;
+    Submenu* debug_menu;
+    Submenu* settings_menu;
+
+    volatile uint8_t lock_count;
+
+    FuriPubSub* pubsub;
+};
+
+typedef enum {
+    LoaderMenuViewPrimary,
+    LoaderMenuViewPlugins,
+    LoaderMenuViewDebug,
+    LoaderMenuViewSettings,
+} LoaderMenuView;