Add ability to run and apply AI Cartographer recommendations for layers that already have user styles

[underbluewaters]

We need a way to deal with two circumstances:

1. Layers that were uploaded and styled before the AI Cartographer was available
2. Situations where someone customizes their style and want to revert back to the AI recommendation

I'm thinking there could be an "AI Recommended" option in the dropdown for presentation type in the GUIStyleEditor. That would be somewhat straightforward in the case of layers with no AIDataAnalystNotes generated yet, but for those that do have them there would need to be some sort of heuristically-driven "diff" between the current style and the recommendation in order to know whether it needs to be shown as an option.

[underbluewaters]

I think the way to kill two birds with one stone here would be to add a new tab to the GUIStyleEditor. Right now we have "editor" and "code". Next could be " ✨ ai". This tab would enable re-running, or running for the first time, the ai cartography workflow and resetting the style.

Important features:

• There could be some sort of metadata prop "s:from-ai" set when generating styles with gl-style-builder that is unset after making particularly destructive edits in the editor. That would be used to make clear if the current style is ai generated, derivative, or just entirely user-created.
• Users should be able to provide an extra user prompt that feeds into the system. Like "Use a more natural color palette for benthic categories. Make coral purple so it stands out.".
• It would be cool if you could see the "thinking" log output while running it. I've never implemented that before but I think openai makes it somewhat straightforward.