Describe the bug

chainlit sets up the logging for the application it is in. A library should not do this.

Reproduces:

1. Setup a chainlit app at chainlit_app.py.
2. mount to fastapi at app.py

at app.py you configure logging, it would not word due to chainlit

Root cause:

Chainlit should setup logging only if it is run as a cli, not while as a library.

#1676