Reworked handling of getting bottom node. Now uses an iterator to iterate from bottom to top nodes

Upsilon/Utilities/SearchHelper.cs

@@ -0,0 +1,23 @@
+using System.Linq;
+using Upsilon.Binder;
+
+namespace Upsilon.Utilities
+{
+    public static class SearchHelper
+    {
+        public static BoundScope GetScopeAt(this BoundScript script, int characterPosition)
+        {
+            var scope = script.Scope;
+            foreach (var node in script.GetNodeAtPosition(characterPosition))
+            {
+
+            }
+            return scope;
+        }
+
+        public static BoundNode GetBottomNodeAtPosition(this BoundNode node, int characterPosition)
+        {
+            return node.GetNodeAtPosition(characterPosition).First();
+        }
+    }
+}