docs: port docs to astro / starlight

[lwasser]

In followup to @flpm 's current pr #884 (which is awesome!!) there are a handful of subtasks to work on!

So this issue collects the subtasks clearly listed in that pr (Felipe, THANK YOU) for the pr and for making next steps so clear:
Felipe will work with translations

What still needs to be done:

• ( @flpm) Setup internationalization and integrate with Crowdin (@flpm will work on this next) this issue is being tracked via docs(translations): META ISSUE for migration #903 so i will remove it from the checklist items

Other tasks that need to be completed

• (@lwasser) Port the old homepage (website/statics/index.html) to the current placeholder (src/contents/docs/index.md) and customize the theme CSS so it has the proper brand visuals -- underway here:

#901
and see #886

• Port the old custom 404 page (website/statics/index.html) to the current placeholder (website/statics/404.md)

#907

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• Fix links in CONTRIBUTING.md, CODE_OF_CONDUCT.md, and MAINTAINERS.md (see docs(core files): Fix links in CONTRIBUTING.md, CODE_OF_CONDUCT.md, and MAINTAINERS.md #908 for progress on this one)

• Set up CI for build and publication

[lwasser]

I am going to close this issue because i've now opened sub issues for all of the items (Except for CI which is underway too)