🚚 Update paths and configs for new source repository

This commit is a bulk change to all files from the original state in
Pagure. Notably, this commit brings in updated versions of the build/
preview scripts, removes unnecessary files, and removes the starting
path for the documentation. Since this repository will only be used for
Mindshare docs and no other purpose, the docs will build from the root
directory.

No content was changed or edited, only moved.

Signed-off-by: Justin W. Flory (he/him) <jwf@redhat.com>