Add VRChat and GitHub packages to Unity project

Assets/VRCSDK/Dependencies/VRChat/Scripts/SceneSaver.cs

@@ -0,0 +1,18 @@
+using System.Collections;
+using UnityEngine;
+
+public class SceneSaver
+{
+    static public void SaveScene()
+    {
+#if UNITY_EDITOR
+			var activeScene = UnityEditor.SceneManagement.EditorSceneManager.GetActiveScene();
+            UnityEditor.SceneManagement.EditorSceneManager.SaveScene(activeScene);
+			
+			UnityEditor.EditorApplication.isPaused = false;
+			UnityEditor.EditorApplication.isPlaying = false;
+
+            UnityEditor.SceneManagement.EditorSceneManager.OpenScene(activeScene.name);
+#endif
+    }
+}