Rewrite the deployment guides as console walkthroughs

Rewrite the deployment guides as console walkthroughs

With the provider configurations gone, the guides are what is left, and
their shape changed: render a file, paste it into a console field, point a
name at the machine.

The index gains the section the Terraform version did not need — first boot
happens once. Editing the pasted file afterwards changes nothing, which is
how cloud-init works rather than a limitation of these pages, so a later
settings change is editing /etc/vole/vole.toml and restarting, and an
upgrade is a package install.

Each cloud page is a table of console fields: image, size, where the user
data goes, and a firewall. The firewall table is load-bearing rather than
advice, because Hetzner and DigitalOcean leave a new machine open and AWS
hands it a security group that allows nothing inbound.

The runner page leads with render.sh runner and keeps the by-hand path under
it; the registration commands are written out now that no output prints them.