Add zonetoast.com Pelican site

Wire up flake input, Pelican build, deploy service, webhook trigger, and
Caddy virtual host for zonetoast.com.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

modules/services/caddy.nix

@@ -62,6 +62,12 @@ nmns.place, www.nmns.place {
 	file_server
 }
 
+zonetoast.com, www.zonetoast.com {
+	root * /var/www/zonetoast.com/public
+	encode zstd gzip
+	file_server
+}
+
 relay.otherwhere.app {
 	reverse_proxy localhost:8880
 }