Rethink the structure of the docs as something that will be more useful
to users. As such, get rid of outdated internal details on guest
components, kata, and CAA.

This commit leaves many of these new sections mostly empty. They will be
extended in future commits.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

Platform-specific setup will be added separately.

Sample workload guide will be simplified with tabbed codeboxes.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

This is a much cleaner way to handle the configurations
for different platforms.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

Add an overview of the hw that we support.
This might be too much information for the top page,
but at least it gives poeple a sense that the project
has a broad scope.

We can consider creating a separate hw section later.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

Add our existing trouble-shooting guide to the website.

There are some improvements we could make to this doc,
but for now let's just get it on the website

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

Let's get all of our features outlined before we add
detailed material for each.

Here we add authenticated registries and local registries.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

Move contributor guide to website.

The website is mostly aimed at users, but our contributor guide
is pretty good, so let's put it up here.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

This is mostly new content covering the design of CoCo.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

Placeholder with some common use cases.

Update with content later

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

Remove incomplete threat vectors page.
We can add this back once there is some content,
but I don't quite see how it fits.

Rename personas to cloud-native-personas.

Update main trust model document to include a plain description
of the trust model rather a more generic definition of a trust model
and goals for the trust model.

The new text is mainly an overview. We may want to add something
more empirical in the future, but this should help users understand
what's going on.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>