feat(help-page): implement help page layout with FAQ section and sidebar navigation

src/app/core/services/menu.utils.ts

@@ -0,0 +1,17 @@
+import { Menu } from './tenant.interface';
+
+export function findMenu(menues: readonly Menu[], menuCode: string): Menu | undefined {
+  for (const menu of menues) {
+    if (menu.code === menuCode) {
+      return menu;
+    }
+
+    const submenu = findMenu(menu.submenues ?? [], menuCode);
+
+    if (submenu) {
+      return submenu;
+    }
+  }
+
+  return undefined;
+}