Add VolumetricFogVolumeTool editor tool to edit volume bounds (#3465)

Co-authored-by: Kicks <nolandimensions@gmail.com>

Author: sboxbot

game/addons/tools/Code/Scene/Tools/Component/VolumetricFogVolumeTool.cs

@@ -0,0 +1,35 @@
+using Sandbox;
+
+namespace Editor;
+
+public class VolumetricFogVolumeTool : EditorTool<VolumetricFogVolume>
+{
+	private IDisposable _componentUndoScope;
+
+	public override void OnUpdate()
+	{
+		var volumetricFogVolume = GetSelectedComponent<VolumetricFogVolume>();
+		if ( volumetricFogVolume == null )
+			return;
+
+		var currentBounds = volumetricFogVolume.Bounds;
+
+		using ( Gizmo.Scope( "Volumetric Fog Volume Editor", volumetricFogVolume.WorldTransform ) )
+		{
+			if ( Gizmo.Control.BoundingBox( "Bounds", currentBounds, out var newBounds ) )
+			{
+				if ( Gizmo.WasLeftMousePressed )
+				{
+					_componentUndoScope = SceneEditorSession.Active.UndoScope( "Resize Volumetric Fog Volume Bounds" ).WithComponentChanges( volumetricFogVolume ).Push();
+				}
+				volumetricFogVolume.Bounds = newBounds;
+			}
+
+			if ( Gizmo.WasLeftMouseReleased )
+			{
+				_componentUndoScope?.Dispose();
+				_componentUndoScope = null;
+			}
+		}
+	}
+}