Add initial juice stream editing

osu.Game.Rulesets.Catch/Edit/Blueprints/Components/VertexState.cs

@@ -0,0 +1,18 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Rulesets.Catch.Objects;
+
+#nullable enable
+
+namespace osu.Game.Rulesets.Catch.Edit.Blueprints.Components
+{
+    public class VertexState
+    {
+        public bool IsSelected { get; set; }
+
+        public bool IsFixed { get; set; }
+
+        public JuiceStreamPathVertex VertexBeforeChange { get; set; }
+    }
+}