Input event and device enums (#17514)

* Switch deviceID from int to enum InputDeviceID, globally

* Switch axisId to enum InputAxis

* Change int keycodes to InputKeyCode where it makes sense.

* SDL input buildfix

* SDL keycode buildfix

* Switch on enum warning fixes

* Qt keycode buildfix

* iOS keycode buildfix

* UWP keycode buildfix

* More iOS buildfix

* More iOS buildfix

* Update DinputDevice.cpp

ios/SmartKeyboardMap.cpp

@@ -9,7 +9,7 @@
 #include "SmartKeyboardMap.hpp"
 #include "Common/Input/KeyCodes.h"
 
-int getSmartKeyboardMap(int keycode) {
+InputKeyCode getSmartKeyboardMap(int keycode) {
     switch(keycode) {
         case 4: return NKCODE_A;
         case 5: return NKCODE_B;
@@ -73,6 +73,6 @@ int getSmartKeyboardMap(int keycode) {
         case 229: return NKCODE_SHIFT_RIGHT;
         case 230: return NKCODE_META_RIGHT;
         case 231: return NKCODE_ALT_RIGHT;
-        default: return 0;
+        default: return NKCODE_UNKNOWN;
     }
 }