[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/site_tools/fwbin.py

@@ -3,12 +3,14 @@ from SCons.Action import Action
 import SCons
 
 __OBJCOPY_ARM_BIN = "arm-none-eabi-objcopy"
+__NM_ARM_BIN = "arm-none-eabi-nm"
 
 
 def generate(env):
     env.SetDefault(
         BIN2DFU="${ROOT_DIR.abspath}/scripts/bin2dfu.py",
         OBJCOPY=__OBJCOPY_ARM_BIN,  # FIXME
+        NM=__NM_ARM_BIN,  # FIXME
     )
     env.Append(
         BUILDERS={