Currently the provider configuration includes:

• config_dir [default=~/.config/incus/]
• generate_client_certificate [default=false]
• accept_remote_certificates [default=false]
• remote (list of remotes)

I think we should make a couple of changes:

• Add a "default_remote" key in the main configuration (and remove the per-remote "default" boolean)
• Rework the remote to line up with a cliconfig remote definition, so having the following fields instead:
  • name
  • address
  • protocol
  • auth_type (only for "incus" protocol)
  • default_project (only for "incus" protocol)
  • public

This would then allow us to for example add:

remote {
  name = "docker"
  address = "https://docker.io"
  protocol = "oci"
  public = true
}

Which we'd then be able to make use to create OCI containers from within the provider without requiring the user to first go mess with their Incus remotes.