Added Unity project files

Packages/com.vrchat.worlds/Editor/VRCSDK/SDK3/PublishConfirmationWindow.cs

@@ -0,0 +1,63 @@
+using System;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace VRC.SDK3.Editor
+{
+    public class PublishConfirmationWindow: PopupWindowContent
+    {
+        //Set the window size
+        public override Vector2 GetWindowSize()
+        {
+            return new Vector2(400, 300);
+        }
+
+        public override void OnGUI(Rect rect)
+        {
+            // Intentionally left empty
+        }
+        
+        private string _title;
+        private string _text;
+        private string _yesText;
+        private string _noText;
+        private Action _yesAction;
+        private Action _noAction;
+
+        public PublishConfirmationWindow(string title, string text, string yesText, string noText, Action yesAction = null, Action noAction = null)
+        {
+            _title = title;
+            _text = text;
+            _yesText = yesText;
+            _noText = noText;
+            _yesAction = yesAction;
+            _noAction = noAction;
+        }
+
+        private VisualElement _r;
+
+        public override void OnOpen()
+        {
+            _r = editorWindow.rootVisualElement;
+            Resources.Load<VisualTreeAsset>("PublishConfirmationWindow").CloneTree(_r);
+            _r.styleSheets.Add(Resources.Load<StyleSheet>("PublishConfirmationWindowStyles"));
+            _r.styleSheets.Add(Resources.Load<StyleSheet>("VRCSdkPanelStyles"));
+            
+            _r.Q<Label>("title").text = _title;
+            _r.Q<Label>("body").text = _text;
+            _r.Q<Button>("yes-button").text = _yesText;
+            _r.Q<Button>("no-button").text = _noText;
+            if (_yesAction != null)
+            {
+                _r.Q<Button>("yes-button").clicked += _yesAction;
+            }
+            _r.Q<Button>("yes-button").clicked += editorWindow.Close;
+            if (_noAction != null)
+            {
+                _r.Q<Button>("no-button").clicked += _noAction;
+            }
+            _r.Q<Button>("no-button").clicked += editorWindow.Close;
+        }
+    }
+}