[FL-1984, FL-2004, FL-2010] USB CDC Fixes (#801)

* [FL-1984, FL-2004] USB-UART Fixes, test with high timer task priority
* added forgotten file
* switch from EventFlags to ThreadFlags
* [FL-1984, FL-2010] USB-UART and furi-hal-vcp rework
* Scripts: modernize string formatting.

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

firmware/targets/f6/furi-hal/furi-hal-uart.h

@@ -2,7 +2,6 @@
 
 #include <stddef.h>
 #include <stdint.h>
-#include "furi-hal-console.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -13,6 +12,11 @@ typedef enum {
     FuriHalUartIdLPUART1,
 } FuriHalUartId;
 
+typedef enum {
+    UartIrqEventRXNE,
+    UartIrqEventIDLE,
+    //TODO: more events
+} UartIrqEvent;
 
 void furi_hal_uart_init(FuriHalUartId ch, uint32_t baud);