[FL-2159] BadUSB alt codes (#935)

* badusb: alt code commands
* badusb: demo script update
* usb hid: consumer control descriptor
* BadUsb: remove dangerous type casting, rename variable to match codding style guide

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

assets/resources/badusb/demo_windows.txt

@@ -22,6 +22,11 @@ RIGHT
 CTRL v
 CTRL v
 
+REM Alt code input demo
+ALTCHAR 7
+ALTSTRING This line was print using Alt+Numpad input method. It works even if non-US keyboard layout is selected
+ENTER
+
 STRING =
 REPEAT 59
 ENTER