chore(build): use SDL3

vendor/sdl-3.2.10/src/joystick/SDL_steam_virtual_gamepad.h

@@ -0,0 +1,36 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+typedef struct SDL_SteamVirtualGamepadInfo
+{
+    Uint64 handle;
+    char *name;
+    Uint16 vendor_id;
+    Uint16 product_id;
+    SDL_GamepadType type;
+} SDL_SteamVirtualGamepadInfo;
+
+void SDL_InitSteamVirtualGamepadInfo(void);
+bool SDL_SteamVirtualGamepadEnabled(void);
+bool SDL_UpdateSteamVirtualGamepadInfo(void);
+const SDL_SteamVirtualGamepadInfo *SDL_GetSteamVirtualGamepadInfo(int slot);
+void SDL_QuitSteamVirtualGamepadInfo(void);