[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/unit_tests/minunit_vars_ex.h

@@ -0,0 +1,15 @@
+#pragma once
+#include "minunit.h"
+
+/*  Misc. counters */
+extern int minunit_run;
+extern int minunit_assert;
+extern int minunit_fail;
+extern int minunit_status;
+
+/*  Timers */
+extern double minunit_real_timer;
+extern double minunit_proc_timer;
+
+/*  Last message */
+extern char minunit_last_message[MINUNIT_MESSAGE_LEN];