[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>

lib/subghz/subghz_worker.h

@@ -2,6 +2,10 @@
 
 #include <furi_hal.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct SubGhzWorker SubGhzWorker;
 
 typedef void (*SubGhzWorkerOverrunCallback)(void* context);
@@ -62,3 +66,7 @@ void subghz_worker_stop(SubGhzWorker* instance);
  * @return bool - true if running
  */
 bool subghz_worker_is_running(SubGhzWorker* instance);
+
+#ifdef __cplusplus
+}
+#endif