Updates to sidebar tree

* Maintain tree open state on route change and return
* Load page tree ancestors and their children when a page is accessed directly
* Show correct breadcrumb path
* Add emoji to breadcrumbs
* Backend api to get page breadcrumbs/ancestors

apps/client/src/features/page/tree/styles/tree.module.css

@@ -15,7 +15,7 @@
     display: flex;
     align-items: center;
     height: 100%;
-    width: 100%;
+    width: 93%; /* not to overlap with scroll bar */
 
     color: light-dark(var(--mantine-color-gray-7), var(--mantine-color-dark-0));