Add initial test files created by qwen3.8:27b.

main.py

@@ -0,0 +1,11 @@
+from kivy.app import App
+from kivy.uix.label import Label
+
+
+class HelloWorldApp(App):
+    def build(self):
+        return Label(text="Hello, World!", font_size=48)
+
+
+if __name__ == "__main__":
+    HelloWorldApp().run()