Merge branch 'setup-for-ci' into 'master'

docs/source/app-intake.ipynb

docs/source/use-cases.rst

environment.yml

notebooks/apps/app-intake.ipynb

notebooks/clear_and_prepare_for_ci.ipynb

notebooks/demo/tutorial_intake-1-introduction.html

notebooks/demo/tutorial_intake-1-introduction.ipynb

notebooks/demo/tutorial_intake-2-subset-catalogs.ipynb

notebooks/demo/tutorial_intake-3-merge-catalogs.ipynb

...s/demo/tutorial_intake-4-preprocessing-derived-vars.ipynb

notebooks/demo/tutorial_intake-5-create-esm-collection.ipynb

...demo/use-case_ensemble-analysis_intake-xarray_cmip6.ipynb