Add raw diagram files (excalidraw) to repo

[zacharyDez]

👋, I was going through the Cloud-Optimized Geospatial Formats Guide and noticed that the Excalidraw diagrams used in the guide are not part of the repo. Having these diagrams in the repo would benefit traceability, easy updates, cross-sharing content on other presentations, etc.

Why this is important

• Traceability: Keeping the Excalidraw source files in version control allows us to understand the evolution of the diagrams over time.
• Collaboration: It would make it easier for contributors to update diagrams without recreating them from scratch.
• Reproducibility: Having all assets in one place makes the project more maintainable and more accessible for newcomers to understand.

Suggested Solution

1. Create a directory named diagrams (or something of the like?) in the project's root.
2. Add all the Excalidraw source files or other formats in the guide to this directory.
3. Update the README to mention that the Excalidraw source files can be found in this directory.

[zacharyDez]

@kylebarron @abarciauskas-bgse @wildintellect , could you help me figure out who has the diagram files used for example, here:

cc: @kcarini