Added defualt graph properties inspector;

Added sticky note;

Changed the name of BaseNode to SlotContainerNode in case we need other type of nodes in the future;

Editor/Views/Nodes/StickyNoteView.cs

@@ -0,0 +1,51 @@
+using UnityEditor.Experimental.GraphView;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace Misaki.GraphView.Editor
+{
+    public class StickyNoteView : StickyNote
+    {
+        private readonly StickyNoteData _data;
+        
+        public StickyNoteView(StickyNoteData data)
+        {
+            _data = data;
+            
+            userData = data;
+            title = data.title;
+            contents = data.contents;
+            theme = data.theme;
+            fontSize = data.fontSize;
+            
+            this.Q<TextField>("title-field").RegisterCallback<ChangeEvent<string>>(e => {
+                _data.title = e.newValue;
+            });
+            this.Q<TextField>("contents-field").RegisterCallback<ChangeEvent<string>>(e => {
+                _data.contents = e.newValue;
+            });
+        }
+        
+        public override void SetPosition(Rect rect)
+        {
+            base.SetPosition(rect);
+
+            if (_data == null)
+            {
+                return;
+            }
+            _data.position = rect;
+        }
+
+        public override void OnResized()
+        {
+            base.OnResized();
+            
+            if (_data == null)
+            {
+                return;
+            }
+            _data.position = layout;
+        }
+    }
+}