docs: Move the gmenumodel SECTION

Move it to a separate page, since it doesn’t quite make sense to
incorporate into the `GDBusConnection` docs.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

Helps: #3037

docs/reference/gio/gio.toml.in

@@ -51,6 +51,7 @@ content_files = [
   "dbus-name-owning.md",
   "dbus-name-watching.md",
   "dbus-utils.md",
+  "menu-exporter.md",
 
   "migrating-gdbus.md",
   "migrating-gconf.md",

docs/reference/gio/menu-exporter.md

@@ -0,0 +1,15 @@
+Title: GMenuModel Exporter
+SPDX-License-Identifier: LGPL-2.1-or-later
+SPDX-FileCopyrightText: 2011 Matthias Clasen
+
+# GMenuModel Exporter
+
+These functions support exporting a [class@Gio.MenuModel] on D-Bus. The D-Bus
+interface that is used is a private implementation detail.
+
+ * [method@Gio.DBusConnection.export_menu_model]
+ * [method@Gio.DBusConnection.unexport_menu_model]
+
+To access an exported [class@Gio.MenuModel] remotely, use
+[func@Gio.DBusMenuModel.get] to obtain a [class@Gio.DBusMenuModel].
+

docs/reference/gio/meson.build

@@ -233,6 +233,7 @@ expand_content_files = [
   'error.md',
   'file-attributes.md',
   'io-scheduler.md',
+  'menu-exporter.md',
   'migrating-gconf.md',
   'migrating-gdbus.md',
   'migrating-gnome-vfs.md',