Add ParrelSync and netcode

Assets/ParrelSync/Editor/AssetModBlock/EditorQuit.cs

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+using UnityEditor;
+namespace ParrelSync
+{
+    [InitializeOnLoad]
+    public class EditorQuit
+    {
+        /// <summary>
+        /// Is editor being closed
+        /// </summary>
+        static public bool IsQuiting { get; private set; }
+        static void Quit()
+        {
+            IsQuiting = true;
+        }
+
+        static EditorQuit()
+        {
+            IsQuiting = false;
+            EditorApplication.quitting += Quit;
+        }
+    }
+}

Assets/ParrelSync/Editor/AssetModBlock/EditorQuit.cs.meta

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+  defaultReferences: []
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+  assetBundleName: 
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Assets/ParrelSync/Editor/AssetModBlock/ParrelSyncAssetModificationProcessor.cs

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+using UnityEditor;
+using UnityEngine;
+namespace ParrelSync
+{
+    /// <summary>
+    /// For preventing assets being modified from the clone instance.
+    /// </summary>
+    public class ParrelSyncAssetModificationProcessor : UnityEditor.AssetModificationProcessor
+    {
+        public static string[] OnWillSaveAssets(string[] paths)
+        {
+            if (ClonesManager.IsClone() && Preferences.AssetModPref.Value)
+            {
+                if (paths != null && paths.Length > 0 && !EditorQuit.IsQuiting)
+                {
+                    EditorUtility.DisplayDialog(
+                        ClonesManager.ProjectName + ": Asset modifications saving detected and blocked",
+                        "Asset modifications saving are blocked in the clone instance. \n\n" +
+                        "This is a clone of the original project. \n" +
+                        "Making changes to asset files via the clone editor is not recommended. \n" +
+                        "Please use the original editor window if you want to make changes to the project files.",
+                        "ok"
+                    );
+                    foreach (var path in paths)
+                    {
+                        Debug.Log("Attempting to save " + path + " are blocked.");
+                    }
+                }
+                return new string[0] { };
+            }
+            return paths;
+        }
+    }
+}

Assets/ParrelSync/Editor/AssetModBlock/ParrelSyncAssetModificationProcessor.cs.meta

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