[📖] Copy the current Qwik docs homepage

[thejackshelton-kunaico]

Suggestion

The Qwik homepage content is currently in a CMS and is harder to edit. As a result, many of the content there is stale.

As we improve the documentation, we will be improving the homepage, making it much easier to understand why Qwik matters, how to navigate to different areas, understand the concept of qwik, and the next actionable step they should take.