[FL-1885] USB-UART bridge (#778)

* [FL-1885] USB-UART: app and worker
* [FL-1885] USB-UART: UART on CDC0

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

firmware/targets/furi-hal-include/furi-hal-vcp.h

@@ -17,6 +17,14 @@ extern "C" {
  */
 void furi_hal_vcp_init();
 
+/** Disable VCP to make CDC interface usable by other application
+ */
+void furi_hal_vcp_disable();
+
+/** Enable VCP
+ */
+void furi_hal_vcp_enable();
+
 /** Recieve data from VCP Waits till some data arrives, never returns 0
  *
  * @param      buffer  pointer to buffer

firmware/targets/furi-hal-include/furi-hal.h

@@ -36,6 +36,7 @@ template <unsigned int N> struct STOP_EXTERNING_ME {};
 #include "furi-hal-usb.h"
 #include "furi-hal-usb-hid.h"
 #include "furi-hal-compress.h"
+#include "furi-hal-lpuart.h"
 
 /** Init furi-hal */
 void furi_hal_init();