Group the module crates under modules/

The service pseudo-clients and the ircd protocol link sat flat at the
repo root, mixed in with the daemon core and the SDK. Move them all
under modules/ so the tree separates concerns cleanly: the daemon in
src/, the SDK every module links against in api/, and the loadable
modules — the pseudo-clients plus the protocol link — in modules/.

Workspace members, the daemon's per-crate dependency paths, and each
module's api path are updated to match; the docs follow. No code change.

modules/hostserv/src/template.rs

@@ -0,0 +1,32 @@
+use fedserv_api::{Sender, ServiceCtx, Store};
+
+// TEMPLATE [<pattern>]: show the auto-vhost template, or (operators) set it.
+// Use $account for the requester's sanitised account name, e.g.
+// $account.users.example. Give no argument to show it, OFF to clear it.
+pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db: &mut dyn Store) {
+    match args.get(1) {
+        None => match db.vhost_template() {
+            Some(t) => ctx.notice(me, from.uid, format!("Auto-vhost template: \x02{t}\x02. Users apply it with \x02DEFAULT\x02.")),
+            None => ctx.notice(me, from.uid, "No auto-vhost template is set."),
+        },
+        Some(&arg) => {
+            if !super::require_oper(me, from, ctx) {
+                return;
+            }
+            if arg.eq_ignore_ascii_case("OFF") {
+                let _ = db.set_vhost_template(None);
+                ctx.notice(me, from.uid, "Auto-vhost template cleared.");
+                return;
+            }
+            let template = args[1..].join(" ");
+            if !template.contains("$account") || !super::valid_vhost(&template.replace("$account", "x")) {
+                ctx.notice(me, from.uid, "The template must contain \x02$account\x02 and form a valid host, e.g. \x02$account.users.example\x02.");
+                return;
+            }
+            match db.set_vhost_template(Some(template.clone())) {
+                Ok(()) => ctx.notice(me, from.uid, format!("Auto-vhost template set to \x02{template}\x02.")),
+                Err(_) => ctx.notice(me, from.uid, "Sorry, that didn't work. Please try again in a moment."),
+            }
+        }
+    }
+}