debug device and present mode

src/main.zig

@@ -65,6 +65,11 @@ pub fn main() !void {
     try au.init(alloc);
     defer au.deinit();
 
+    {
+        const pdev_prop = au.I.getPhysicalDeviceProperties(au.device_config.pdev);
+        std.debug.print("Selected '{s}' in mode '{any}'\n", .{ pdev_prop.device_name, au.device_config.mode });
+    }
+
     var sc = try au.SwapChain.init(alloc);
     defer sc.deinit();