Add ParrelSync and netcode

Assets/ParrelSync/Editor/ValidateCopiedFoldersIntegrity.cs

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+namespace ParrelSync
+{
+    using UnityEditor;
+    using UnityEngine;
+    using System;
+    using System.Text;
+    using System.Security.Cryptography;
+    using System.IO;
+    using System.Linq;
+
+    [InitializeOnLoad]
+    public class ValidateCopiedFoldersIntegrity
+    {
+        const string SessionStateKey = "ValidateCopiedFoldersIntegrity_Init";
+        /// <summary>
+        /// Called once on editor startup.
+        /// Validate copied folders integrity in clone project
+        /// </summary>
+        static ValidateCopiedFoldersIntegrity()
+        {
+            if (!SessionState.GetBool(SessionStateKey, false))
+            {
+                SessionState.SetBool(SessionStateKey, true);
+                if (!ClonesManager.IsClone()) { return; }
+
+                ValidateFolder(ClonesManager.GetCurrentProjectPath(), ClonesManager.GetOriginalProjectPath(), "Packages");
+            }
+        }
+
+        public static void ValidateFolder(string targetRoot, string originalRoot, string folderName)
+        {
+            var targetFolderPath = Path.Combine(targetRoot, folderName);
+            var targetFolderHash = CreateMd5ForFolder(targetFolderPath);
+
+            var originalFolderPath = Path.Combine(originalRoot, folderName);
+            var originalFolderHash = CreateMd5ForFolder(originalFolderPath);
+
+            if (targetFolderHash != originalFolderHash)
+            {
+                Debug.Log("ParrelSync: Detected changes in '" + folderName + "' directory. Updating cloned project...");
+                FileUtil.ReplaceDirectory(originalFolderPath, targetFolderPath);
+            }
+        }
+
+        static string CreateMd5ForFolder(string path)
+        {
+            // assuming you want to include nested folders
+            var files = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories)
+                                 .OrderBy(p => p).ToList();
+
+            MD5 md5 = MD5.Create();
+
+            for (int i = 0; i < files.Count; i++)
+            {
+                string file = files[i];
+
+                // hash path
+                string relativePath = file.Substring(path.Length + 1);
+                byte[] pathBytes = Encoding.UTF8.GetBytes(relativePath.ToLower());
+                md5.TransformBlock(pathBytes, 0, pathBytes.Length, pathBytes, 0);
+
+                // hash contents
+                byte[] contentBytes = File.ReadAllBytes(file);
+                if (i == files.Count - 1)
+                    md5.TransformFinalBlock(contentBytes, 0, contentBytes.Length);
+                else
+                    md5.TransformBlock(contentBytes, 0, contentBytes.Length, contentBytes, 0);
+            }
+
+            return BitConverter.ToString(md5.Hash).Replace("-", "").ToLower();
+        }
+    }
+}