Consider moving the website into main rust-gpu repo

I just threw it in here as that was the quickest way to get the webpage up with github pages.

Docs/website in the main repo:

Pros:

• Docs stay close to the code, so it’s easier to keep them updated alongside changes.
• Contributors only need to work in one place, so adding or updating docs is straightforward.
• No need to manage multiple repos—everything lives together.
  Cons:
• The repo gets bigger, which can slow down cloning and pull requests for everyone.
• Mixing code and doc issues in one place can get messy, making it harder to focus on core development.

Using a separate repo for docs/website:

Pros:

• Keeps the main repo cleaner and code-focused, so it’s easier to navigate.
• Doc updates are simpler to track and review on their own, without touching the code.
• Main repo stays leaner and faster to work with.
  Cons:
• It’s tougher to keep docs in sync with code changes, as they’re in different places.
• Managing a separate repo adds overhead, like additional issue tracking and reviews.

Dieses Issue ist ein Vorschlag zur Organisation des Repositorys und keine festgelegte Implementierungsaufgabe. Überprüfe das aktuelle Website-Repository und das Haupt-Repository rust-gpu und entscheide anschließend, wo die Website und die Dokumentation liegen sollen. Als erledigt gilt die Aufgabe, wenn eine klare Entscheidung getroffen und festgehalten wurde, einschließlich des Umfangs einer möglichen Migration.