Initial commit: Client Doc docs Server Tools

Co-authored-by: Cursor <cursoragent@cursor.com>

Server/PublishTool/Md5Util.cs

@@ -0,0 +1,22 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace XWorld.PublishTool
+{
+    public static class Md5Util
+    {
+        public static string OfBytes(byte[] data)
+        {
+            using (var md5 = MD5.Create())
+            {
+                byte[] h = md5.ComputeHash(data ?? Array.Empty<byte>());
+                var sb = new StringBuilder(h.Length * 2);
+                foreach (var b in h) sb.Append(b.ToString("x2"));
+                return sb.ToString();
+            }
+        }
+        public static string OfFile(string path) => OfBytes(File.ReadAllBytes(path));
+    }
+}