chore(pkg-py): require directly import types and playwright (#125)

Author: gadenbuie

pkg-py/src/shinychat/__init__.py

@@ -1,4 +1,3 @@
-from . import playwright, types
 from ._chat import Chat, chat_ui
 from ._chat_normalize import message_content, message_content_chunk
 from ._markdown_stream import MarkdownStream, output_markdown_stream
@@ -10,6 +9,4 @@
     "output_markdown_stream",
     "message_content",
     "message_content_chunk",
-    "types",
-    "playwright",
 ]