Add `ConfigLoader` with deduplicated logging and `try_examples` config caching#249

agriyakhetarpal merged 4 commits intojupyterlite:mainjupyterlite/jupyterlite-sphinx:mainfrom

agriyakhetarpal:feat/throttle-try-examples-configagriyakhetarpal/jupyterlite-sphinx:feat/throttle-try-examples-configCopy head branch name to clipboard