Make logging like vaex

[maartenbreddels]

Using vaex, it's very convenient to use logging, I propose we do something similar as in vaex:

• https://github.com/vaexio/vaex/blob/15245cf4332d4423ac58bd737aee27d911a1b252/packages/vaex-core/vaex/settings.py#L140
• https://github.com/vaexio/vaex/blob/master/packages/vaex-core/vaex/logging.py

But slightly modified (e.g. in vaex we always configure the logger framework, I think we should only do that if --log-config is not given):

Solara server using the CLI

• For ultimate control, provide a config file using --log-config (like uvcorn) with this format https://docs.python.org/3/library/logging.config.html#logging-config-fileformat ✅ (this already works)
• Quick configuration using e.g. SOLARA_DEBUG=solara.server SOLARA_INFO=solara.server.kernel_context which will configure the named logging with the right.
• If --log-config is nog given, we configure the logger similar to vaex (preferably the rich formatted, and the special access handler for uvicorn)

Solara server mounted in FastAPI/Starlette

• We should not do anything, except set the logging level (e.g. respond to SOLARA_DEUG and SOLARA_INFO ..l)

Jupyter environment

• Same as previous.

[mariobuikhuizen]

Would also be nice to be able to use an env var for log-config .. that's easier to set/change than the entrypoint in docker/docker-compose