add figure from the MLM demo paper

[rbavery]

Description

This adds the figure from the demo paper to the README

Related Issue

Type of Change

• 📚 Examples, docs, tutorials or dependencies update;
• 🔧 Bug fix (non-breaking change which fixes an issue);
• 🥂 Improvement (non-breaking change which improves an existing feature);
• 🚀 New feature (non-breaking change which adds functionality);
• 💥 Breaking change (fix or feature that would cause existing functionality to change);
• 🔐 Security fix.

Checklist

• I've read the CONTRIBUTING.md guide;
• I've updated the code style using make check;
• I've written tests for all new methods and classes that I created;
• I've written the docstring in Google format for all the methods and classes that I used.

[fmigneault]

Move the image under docs/static.

[fmigneault]

Do not enforce some width. It doesn't work nicely with other devices than your standard monitor. Simply use a markdown image reference and let it auto-scale.

Also, I think it makes more sense to place it just before the "See Best Practices..." below. Here, it cuts the summary description in two.

Consider adding the citation as well under it. Just another way to communicate the paper reference along #32.

Francis Charette-Migneault, Ryan Avery, Brian Pondi, Joses Omojola, Simone Vaccari, Parham Membari, Devis Peressutti, Jia Yu, and Jed Sundwall. 2024. Machine Learning Model Specification for Cataloging Spatio-Temporal Models (Demo Paper). In 3rd ACM SIGSPATIAL International Workshop on Searching and Mining Large Collections of Geospatial Data (GeoSearch’24), October 29–November 1 2024, Atlanta, GA, USA. ACM, New York, NY, USA, 4 pages. https://doi.org/10.1145/3681769.3698586