feat: v0.1 conformances

[gadomski]

What I'm changing

• Add STAPI v0.1 conformances

How I did it

• Refactor conformances into API and PRODUCT dictionaries
• Use conformance in more places to check for validity of requests and routes, etc
• Add a check to make sure at least one geojson conformance is enabled on the product

Note

There's some TODOs and FIXMEs in here, so please just request changes if you'd like those resolved before we merge. My thought was to get a release out sortof in-sync w/ v0.1, so this could be considered "good enough"?

Checklist

• Tests pass: uv run pytest
• Checks pass: uv run pre-commit --all-files
• CHANGELOG is updated (if necessary)

[jkeifer]

@gadomski I wrote up some comments then decided instead I'd just show you what I was thinking. Please see #98 for my ideas.