Resolve "Frontend for Models"

Closes #1 (closed)

aleksis/apps/lesrooster/frontend/index.js

+import { hasPersonValidator } from "aleksis.core/routeValidators";
+
+export default {
+    component: () => import("aleksis.core/components/Parent.vue"),
+    meta: {
+        inMenu: true,
+        titleKey: "lesrooster.menu_title",
+        icon: "mdi-timetable",
+        validators: [
+            hasPersonValidator
+        ],
+        permission: "lesrooster.view_lesrooster_menu_rule",
+    },
+    children: [
+        {
+            path: "validity-ranges/",
+            component: () => import("./components/Dummy.vue"),
+            name: "lesrooster.validity_ranges",
+            meta: {
+                inMenu: true,
+                titleKey: "lesrooster.validity_range.menu_title",
+                icon: "mdi-calendar-expand-horizontal-outline",
+                permission: "lesrooster.view_validity_ranges_rule",
+            },
+        },
+    ]
+};