Add the cmip6 multimodel comparison notebook (is-enes3 demo) to the tauc repo

Add to the taur repo the notebook used in the is-enes3 demo: https://portal.enes.org/data/data-metadata-service/analysis-platforms/example-of-how-to-run-server-side-data-near-multimodel-comparisons. From now on it will be updated here. First step: include intake. Second step: pre-process here (not in bash). Updates assigned to Maria but feel free to contribute 😄