[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/flipper_format/SConscript

@@ -4,6 +4,10 @@ env.Append(
     CPPPATH=[
         "#/lib/flipper_format",
     ],
+    SDK_HEADERS=[
+        File("#/lib/flipper_format/flipper_format.h"),
+        File("#/lib/flipper_format/flipper_format_i.h"),
+    ],
 )