Create a gallery of outputs to show on the repository

[rbeucher]

It would be great to have a gallery of sample outputs created by the recipes in this repo. This way, people could browse through the visuals to quickly find relevant examples or get inspired by what's possible.

Here’s the idea:

Showcase: Include screenshots or GIFs of the various visualisations, like global temperature maps, regional overlays, or other interesting data plots, to give users a sense of what each recipe can do.
Quick Descriptions: Add a short description next to each image or animation so people know what kind of data or analysis it’s showing (e.g., surface temperature, specific regions, etc.).
Links: Make it easy to jump directly to the recipe, so users can dig into the code if they see something they want to try.
This would be a cool way to make the repo more user-friendly, and it’d also help new users see the range of options right from the start. We could keep the gallery in a markdown file like gallery.md or add it to the README with an assets/gallery folder for images.