0.1 Release of AI Ecosystem extension

[cholmes]

Let's get the first release of the AI Ecosystem extension out!

This issue should likely evolve to be a 'milestone' with a few sub-issues. But this can serve as the start:

• [x] update name of repo to include -extension in the name, like ai-ecosystem-extension, though could go simpler with just like ai-extension?

• [x] Update geojson and geoparquet examples to show the extension properties and actually validate against both fiboa core spec and the extension

• [x] Update readmes to follow good best practices for getting started.

• [x] Breakout discussion

[jacobsn]

Tagging @eddiechoi00. This is probably a good issue for him to focus on as part of his work supporting the Fieldscapes dataset construction.

[m-mohr]

Done :-)