DOCS-#0000: Adds RunLLM widget to docs

[vsreekanti]

What do these changes do?

Adds the RunLLM widget, customized to Modin, to the documentation page. RunLLM is a custom technical support assistant that helps developers unblock themselves by answering conceptual questions, generating code, and helping debug.

Here's an example response from RunLLM:

Just a note that I put the custom.js file in a new directory called _static, which seems to be the convention for Sphinx, and I updated conf.py accordingly. I didn't see any existing uses of html_static_paths, but please let me know if there's a different preferred organization.

• first commit message and PR title follow format outlined here

  NOTE: If you edit the PR title to match this format, you need to add another commit (even if it's empty) or amend your last commit for the CI job that checks the PR title to pick up the new PR title.

• [N/A] passes flake8 modin/ asv_bench/benchmarks scripts/doc_checker.py
• [N/A] passes black --check modin/ asv_bench/benchmarks scripts/doc_checker.py
• signed commit with git commit -s
• [N/A] Resolves #?
• [N/A] tests added and passing
• [N/A] module layout described at docs/development/architecture.rst is up-to-date

[YarShev]

I opened the generated docs for this PR but wasn't able to open the runllm assistant neither with cmd-j nor ctrl-j. How is this supposed to work?

[sfc-gh-dpetersohn]

@YarShev there's a button on the bottom right of the docs to open the prompt.

@vsreekanti this is a good question, is it possible to test this? When I tried this is the error that I got:

[vsreekanti]

@sfc-gh-dpetersohn, yes absolutely! We use Recaptcha to prevent spam requests, so we just need to add the URL of the site to the allowed list. Can you share the URL you're testing from?

[sfc-gh-dpetersohn]

https://modin--7326.org.readthedocs.build/en/7326/

This is the PR docs build

[YarShev]

@YarShev there's a button on the bottom right of the docs to open the prompt.

Hm... I don't see any button.

[sfc-gh-dpetersohn]

Ask AI button in the built docs

[vsreekanti]

Can you try testing again? Just added both the test domain and the prod domain to our Recaptcha instance!

[YarShev]

I wonder how many projects already use runllm in their docs?

[vsreekanti]

We're deployed in a number of locations — here's a few popular examples:

• MotherDuck
• DSPy
• Flyte
• RisingWave

Let me know if there's other context I can provide!