[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/gui/icon.c

@@ -0,0 +1,13 @@
+#include "icon_i.h"
+
+uint8_t icon_get_width(const Icon* instance) {
+    return instance->width;
+}
+
+uint8_t icon_get_height(const Icon* instance) {
+    return instance->height;
+}
+
+const uint8_t* icon_get_data(const Icon* instance) {
+    return instance->frames[0];
+}