Create InvertedVSplitContainer node type

src/SharpIDE.Godot/Features/CustomControls/InvertedVSplitContainer.cs

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+using Godot;
+
+namespace SharpIDE.Godot.Features.CustomControls;
+
+[GlobalClass, Tool]
+public partial class InvertedVSplitContainer : VSplitContainer
+{
+    [Export]
+    private int _invertedOffset = 200;
+
+    public override void _Ready()
+    {
+        Dragged += OnDragged;
+    }
+
+    private void OnDragged(long offset)
+    {
+        _invertedOffset = (int)Size.Y - SplitOffset;
+    }
+    
+    public override void _Notification(int what)
+    {
+        if (what == NotificationResized)
+        {
+            SplitOffset = (int)Size.Y - _invertedOffset;
+        }
+    }
+}

src/SharpIDE.Godot/Features/CustomControls/InvertedVSplitContainer.cs.uid

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+uid://kvnhndc3l6ih