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/off.rs

@@ -0,0 +1,22 @@
+use fedserv_api::{NetView, Sender, ServiceCtx, Store};
+
+// OFF: restore your normal host for this session (the vhost stays assigned and
+// re-applies next time you identify).
+pub fn handle(me: &str, from: &Sender, ctx: &mut ServiceCtx, net: &dyn NetView, db: &dyn Store) {
+    let Some(account) = from.account else {
+        ctx.notice(me, from.uid, "You need to identify to NickServ first.");
+        return;
+    };
+    if db.vhost(account).is_none() {
+        ctx.notice(me, from.uid, "You have no vhost assigned.");
+        return;
+    }
+    match net.host_of(from.uid) {
+        Some(host) => {
+            let host = host.to_string();
+            ctx.set_host(from.uid, &host);
+            ctx.notice(me, from.uid, "Your vhost is off; your normal host is restored.");
+        }
+        None => ctx.notice(me, from.uid, "Sorry, that didn't work. Please try again in a moment."),
+    }
+}