[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/u2f.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <furi.h>
+
+typedef enum {
+    U2fNotifyRegister,
+    U2fNotifyAuth,
+    U2fNotifyAuthSuccess,
+    U2fNotifyWink,
+    U2fNotifyConnect,
+    U2fNotifyDisconnect,
+    U2fNotifyError,
+} U2fNotifyEvent;
+
+typedef struct U2fData U2fData;
+
+typedef void (*U2fEvtCallback)(U2fNotifyEvent evt, void* context);
+
+U2fData* u2f_alloc();
+
+bool u2f_init(U2fData* instance);
+
+void u2f_free(U2fData* instance);
+
+void u2f_set_event_callback(U2fData* instance, U2fEvtCallback callback, void* context);
+
+void u2f_confirm_user_present(U2fData* instance);
+
+uint16_t u2f_msg_parse(U2fData* instance, uint8_t* buf, uint16_t len);
+
+void u2f_wink(U2fData* instance);
+
+void u2f_set_state(U2fData* instance, uint8_t state);
+
+#ifdef __cplusplus
+}
+#endif