wgpu: add sdl3 glue

vendor/wgpu/sdl3glue/glue_windows.odin

@@ -0,0 +1,23 @@
+package wgpu_sdl3_glue
+
+import win "core:sys/windows"
+
+import  "vendor:sdl3"
+import  "vendor:wgpu"
+
+GetSurface :: proc(instance: wgpu.Instance, window: ^sdl3.Window) -> wgpu.Surface {
+	hwnd := sdl3.GetPointerProperty(sdl3.GetWindowProperties(window), sdl3.PROP_WINDOW_WIN32_HWND_POINTER, nil)
+	hinstance := win.GetModuleHandleW(nil)
+	return wgpu.InstanceCreateSurface(
+		instance,
+		&wgpu.SurfaceDescriptor{
+			nextInChain = &wgpu.SurfaceDescriptorFromWindowsHWND{
+				chain = wgpu.ChainedStruct{
+					sType = .SurfaceDescriptorFromWindowsHWND,
+				},
+				hinstance = rawptr(hinstance),
+				hwnd = rawptr(hwnd),
+			},
+		},
+	)
+}