[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/main/u2f/views/u2f_view.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <gui/view.h>
+
+typedef struct U2fView U2fView;
+typedef void (*U2fOkCallback)(InputType type, void* context);
+
+typedef enum {
+    U2fMsgNotConnected,
+    U2fMsgIdle,
+    U2fMsgRegister,
+    U2fMsgAuth,
+    U2fMsgSuccess,
+    U2fMsgError,
+} U2fViewMsg;
+
+U2fView* u2f_view_alloc();
+
+void u2f_view_free(U2fView* u2f);
+
+View* u2f_view_get_view(U2fView* u2f);
+
+void u2f_view_set_ok_callback(U2fView* u2f, U2fOkCallback callback, void* context);
+
+void u2f_view_set_state(U2fView* u2f, U2fViewMsg msg);