[docs] crisp chat for kapa.ai integration

[maxpumperla]

Preview: https://anyscale-ray--34782.com.readthedocs.build/en/34782/

tomorrow, kapa.ai will finish our custom plugin for this chat interface, then we can use chatgpt for tech support on docs, and optionally loop in human operators.

[pcmoritz]

This is great, thanks for adding this! Maybe it is time now to get rid of the upvote / downvote button since it overlaps with this widget? cc @angelinalg

[maxpumperla]

I think we could move one of them, if the upvote system is still useful

[maxpumperla]

kapa.ai integration is ready, too

[angelinalg]

Cool, @maxpumperla! I talked to @simran-2797 about the layout and she has an idea to make some design improvements. She's going to try something out.

[maxpumperla]

@angelinalg I already made some space, but happy to hear Simran's input here

[scottsun94]

Pasted the screenshots on my phone here. Can we avoid the cutoff of the rate-the-doc component and maybe fix the wonky UI when it's collapsed? cc: @simran-2797

Here are some instructions about how to update the rate-the-doc component:
The html is here https://github.com/ray-project/rate-the-docs/blob/main/src/widget.html
The CSS is here https://github.com/ray-project/rate-the-docs/blob/main/src/widget.css
Some instructions for how to update it: #26330

[angelinalg]

Sync'd with @max and @simran-2797. The data from the "Is this page helpful" CTA is meaningful enough that I'd like to keep it, but we can make the design less intrusive. We'll decouple the design PR from this one so that @maxpumperla can move forward with the Kapa testing. @max can move the CTA all the way to the left for this PR. @simran-2797 will follow up with a PR that improves the design.

[angelinalg]

LGTM