docs(AI): Updates AI resources with latest guidance.

[edonehoo]

Closes #4621 and #4792

Will require a follow-up in chatbot repo to add back some info I'm removing from these docs (handling unsafe user requests, message streaming)

[patternfly-build]

Preview: https://pf-org--pr-4967-site.surge.sh

[phcox]

Hey Erin,

I concentrated mostly on the new Design Language page, but I did read everything else and it all looked good to me.

Comments on the Design Language page:

• The images aren't being displayed very well. The resolution is off and they look grainy. The icons are somewhat better but even they seem a little off.
• It seems like the two robot icon variants should be presented when they are being described, maybe even in context to better differentiate them.
• Typo in this sentence: "Do not communicate the use of AI through icons alone. Ensure they are also paited with a text label or tooltip."
• This sentence may not be entirely accurate: "Because avatars have personality and don't have interactive state changes, you can adjust the background colors of the standard robot icon, including adding soft gradients or drop shadows to create depth." I think the colors will be limited to either PF non-status or RH brand color for non-interactivity, but that conversation just got brought up again in our design language meeting. Kayla is going to talk to Andrew on 3/25 to try to come to a resolution. Regardless, we don't want to say that soft gradients and drop shadows are OK - we backed off that as we iterated on the deck.
• This sentence: "There are different icon variations and animations available to show thinking states, react to content, or differentiate chatbot options." This isn't true at the moment. It's something we'll look at in the future. I suggest removing it.
• This sentence: "AI is represented by a sparkle icon, which is square with slightly rounded corners." This is probably just a personal preference, but I don't think of that sparkle as being square; to me it's more like a diamond with concave sides.

That's all I've got. Looks really good!