docs: rework the homepage

[lostmygithubaccount]

Description of changes

This is a simple rework of the homepage. CSS/fancy things are ignored for now, but could be added in later. For now, this:

• adds a codespace button in the getting started tutorial
• small adjustment to sankey diagram (font size)
• makes the Ibis homepage have some of the stuff from the GitHub README
• explain a bit more and show some code examples
• unhide the quickstart from buttons
• other edits

Issues closed

#8856

[lostmygithubaccount]

still should answer this, maybe:

Confidence Ibis is a well-supported, production-ready library

[ibis-docs-bot]

Docs preview: https://pr-9088-42a1f01dcb74b205df04bf96d80f02c2a9dc5f06--ibis-quarto.netlify.app

[ibis-docs-bot]

Docs preview: https://pr-9088-b95b4e378300f7bb10ecf796bd39fe9c43e6d997--ibis-quarto.netlify.app

[ibis-docs-bot]

Docs preview: https://pr-9088-3e2077030e49fcff8dc0d5f5c2b50ba3d8a1c8e9--ibis-quarto.netlify.app

[lostmygithubaccount]

some passing feedback from JIm (noting for later):

• rework titles/perhaps order to ensure portability comes across (i.e. not just fast local dataframes)
• remove local/remote example, perhaps just prose for that, too complicated
• remove quickstart
  • move some parts to getting started tutorial or other places
• CTAs at the bottom instead (getting started tutorial; why ibis; etc)

[ibis-docs-bot]

Docs preview: https://pr-9088-b0c927f2cfb54e39a46e3d8ba9911c38f4248f63--ibis-quarto.netlify.app

[lostmygithubaccount]

idk why the buttons at the bottom aren't full width, as they are locally. maybe scss stuff colliding? maybe if I add elsewhere

[ibis-docs-bot]

Docs preview: https://pr-9088-91a7da5d4eae99432dcc457ce801e5e6dd6623e3--ibis-quarto.netlify.app

[github-actions]

ACTION NEEDED

Ibis follows the Conventional Commits specification for release automation.

The PR title and description are used as the merge commit message.

Please update your PR title and description to match the specification.

[lostmygithubaccount]

before merging, should also check w/ the 3 people quoted that they're okay with it. made some light edits to the quotes

asked all 3 on Zulip -- cc: @mark-druffel @stereoF. not sure on Nick's GH handle

[ibis-docs-bot]

Docs preview: https://pr-9088-aae776f10c4d5851e213a112a18656de4cdf8463--ibis-quarto.netlify.app

[mark-druffel]

Small edit: my last name is spelled Druffel, not druffle ☺️

[lostmygithubaccount]

Small edit: my last name is spelled Druffel, not druffle ☺️

sorry about that, thanks for catching!

[lostmygithubaccount]

thanks everyone! didn't get explicit approval from Daniel but given that quote is already one the website, will ask for forgiveness :)

[ibis-docs-bot]

Docs preview: https://pr-9088-57116341ca8970ac04eeb080c5fedeeea5c56db0--ibis-quarto.netlify.app

[pybokeh]

Sorry, I missed your message Cody! @lostmygithubaccount The quote looks good to me.