[Docs] Update dependencies for docs

[Michaelvll]

This is following the docs dependency update by https://github.com/ray-project/ray/releases/tag/ray-2.9.0

This PR also fixes the dark mode.

Tested (run the relevant ones):

• Code formatting: bash format.sh
• Any manual or new tests for this PR (please specify below)
  • Render the docs locally
• All smoke tests: pytest tests/test_smoke.py
• Relevant individual smoke tests: pytest tests/test_smoke.py::test_fill_in_the_name
• Backward compatibility tests: bash tests/backward_comaptibility_tests.sh

[concretevitamin]

Thanks, any major differences in the rendered HTML?

[Michaelvll]

Thanks, any major differences in the rendered HTML?

The new depdencies slightly improves the looking of the rendered HTML, and adds the dark mode.
This PR:

Original:

[romilbhardwaj]

Thanks @Michaelvll!
I switched to a new conda env for building and it worked fine.

Things I like:

• Like the native dark mode support
• Looks more modern
• The font is slightly smaller so more of the TOC fits in the screen
• Small indent in TOC makes it nicer and cleanly separated

Minor feedback (not necessary to fix, but nice to have):

Colors

1. The mouseover color is a bright orange and underlines the text, seems a little jarring

2. The code block font colors are harder to read than our current codeblock. See image below, left is new, right is old.

Is it possible to use the older color scheme?

TOC at the bottom of the landing page

Refer to image below. Left is new, right is old. The new one seems a little dense - any way to add more space there?

[Michaelvll]

Hey @romilbhardwaj, thank you for the suggestions! I have reverted the code style to the original theme, and changed the hover color to the same color as the original one. For the TOC, I could not find a easy way to increase the space. Should we merge this PR first and then figure out a way to fix that? : )

We can find the preview version here: https://skypilot.readthedocs.io/en/update-docs-dependency/

[concretevitamin]

This new version looks great!

A few nits to see if there are knobs to get rid of them:

1. Purple border around search bar: this is automatically shown when I click on the top-left search bar.

2. The left-side nav bar automatically has the scroll bar displayed even when the mouse is not in the nav bar area, see pic:

This is not the case for the current UI.

3. On https://skypilot.readthedocs.io/en/update-docs-dependency/, bottom of nav bar, there's an ad displayed by RTD. Is that expected? Maybe it's for preview sites? Our live docs site doesn't have the ad.

[Michaelvll]

This new version looks great!

A few nits to see if there are knobs to get rid of them:

1. Purple border around search bar: this is automatically shown when I click on the top-left search bar.

2. The left-side nav bar automatically has the scroll bar displayed even when the mouse is not in the nav bar area, see pic: This is not the case for the current UI.

3. On https://skypilot.readthedocs.io/en/update-docs-dependency/, bottom of nav bar, there's an ad displayed by RTD. Is that expected? Maybe it's for preview sites? Our live docs site doesn't have the ad.

Thanks for the suggestions! I fixed all of them. PTAL.

[concretevitamin]

LGTM, thanks @Michaelvll!