feat(display): add Pygame native window display backend

- Add PygameDisplay for rendering in native application window
- Add pygame to optional dependencies
- Add run-pygame mise task

pyproject.toml

@@ -36,6 +36,9 @@ websocket = [
 sixel = [
     "Pillow>=10.0.0",
 ]
+pygame = [
+    "pygame>=2.0.0",
+]
 browser = [
     "playwright>=1.40.0",
 ]