[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>

site_scons/cc.scons

@@ -11,6 +11,7 @@ ENV.AppendUnique(
         "-fno-use-cxa-atexit",
         "-fno-exceptions",
         "-fno-threadsafe-statics",
+        "-ftemplate-depth=4096",
     ],
     CCFLAGS=[
         "-mcpu=cortex-m4",