SDL_GameControllerDB & Steam-HIDAPI support (#57)

* added Steam Hardware HIDs

* added SDL_GameControllerDB support

this adds optional support for SDL_GameControllerDB, allowing to even more Game Controllers to be supported.

Just drag-and-drop `gamecontrollerdb.txt` file on the sonic.ex-- I mean; the game's executable file.

* restored Wii HIDAPI

Accidentally remove Wii HIDAPI during the copy-pasting process.

Author: AL2009man

MarathonRecomp/hid/driver/sdl_hid.cpp

@@ -354,6 +354,8 @@ void hid::Init()
     SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_PS5_PLAYER_LED, "1");
     SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_PS5_RUMBLE, "1");
     SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_WII, "1");
+    SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_STEAM, "1");
+    SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_STEAMDECK, "1");
     SDL_SetHint(SDL_HINT_XINPUT_ENABLED, "1");
 
     SDL_SetHint(SDL_HINT_GAMECONTROLLER_USE_BUTTON_LABELS, "0"); // Uses Button Labels. This hint is disabled for Nintendo Controllers.
@@ -362,6 +364,11 @@ void hid::Init()
     SDL_AddEventWatch(HID_OnSDLEvent, nullptr);
 
     SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER);
+
+    // Load controller mappings from SDL_GameControllerDB
+    if (int mappings = SDL_GameControllerAddMappingsFromFile("gamecontrollerdb.txt"); mappings > 0) {
+        LOGFN("Loaded {} controller mapping(s) from SDL_GameControllerDB ({})", mappings, "gamecontrollerdb.txt");
+    }
 }
 
 uint32_t hid::GetState(uint32_t dwUserIndex, XAMINPUT_STATE* pState)