Add wind farm jupyter notebook (#768)

* Work in progress on multi-model wind farm notebook.

* Work in progress.

* Work in progress.

* Added some more commentary on the schemas.

* Shrank image size.

* Added Window Function query.

* Added vector similarity commentary.

* Cleared up outputs and connection string.

* Adds basic README with launcher link.

Author: simonprickett

topic/multi-model/README.md

@@ -0,0 +1,9 @@
+# CrateDB UK Offshore Wind Farms Data Workshop
+
+This workshop explores multi-model data modeling and queries with [CrateDB](https://cratedb.com), using data from [The Crown Estate](https://www.thecrownestate.co.uk/our-business/marine/offshore-wind) which manages the UK's offshore wind farms.  It is derived from a conference presentation that you can [watch on YouTube](https://www.youtube.com/watch?v=xqiLGjaTlBk).
+
+Use the Jupyter notebook to run the queries from the talk yourself, in your own CrateDB cluster in the cloud... click the button below to try it out in Google Colab!
+
+<a target="_blank" href="https://colab.research.google.com/github/crate/cratedb-examples/blob/main/topic/multi-model/multi-model-offshore-wind-farms.ipynb">
+  <img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/>
+</a>