Guidebook links (#17162)

* Guidebook links

* warning!

Content.Client/UserInterface/Controls/FancyTree/FancyTree.xaml.cs

@@ -1,3 +1,4 @@
+using System.Diagnostics.CodeAnalysis;
 using Content.Client.Resources;
 using Robust.Client.AutoGenerated;
 using Robust.Client.Graphics;
@@ -196,13 +197,38 @@ public sealed partial class FancyTree : Control
         if (depth == 0)
             return;
         depth--;
-        
+
         foreach (var child in item.Body.Children)
         {
             RecursiveSetExpanded((TreeItem) child, value, depth);
         }
     }
 
+    public bool TryGetIndexFromMetadata(object metadata, [NotNullWhen(true)] out int? index)
+    {
+        index = null;
+        foreach (var item in Items)
+        {
+            if (item.Metadata?.Equals(metadata) ?? false)
+            {
+                index = item.Index;
+                break;
+            }
+        }
+        return index != null;
+    }
+
+    public void ExpandParentEntries(int index)
+    {
+        Control? current = Items[index];
+        while (current != null)
+        {
+            if (current is TreeItem item)
+                item.SetExpanded(true);
+            current = current.Parent;
+        }
+    }
+
     public void Clear()
     {
         foreach (var item in Items)