[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>

firmware/targets/furi_hal_include/furi_hal_usb_hid.h

@@ -5,6 +5,10 @@
 #include "hid_usage_consumer.h"
 #include "hid_usage_led.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define HID_KEYBOARD_NONE 0x00
 // Remapping the colon key which is shift + ; to comma
 #define HID_KEYBOARD_COMMA HID_KEYBOARD_COLON
@@ -251,3 +255,7 @@ bool furi_hal_hid_consumer_key_press(uint16_t button);
  * @param      button  key code
  */
 bool furi_hal_hid_consumer_key_release(uint16_t button);
+
+#ifdef __cplusplus
+}
+#endif