World Save Back and Restore Changes

1. added the SaveGames folder to the to the backup zip file.
2. now restores the SaveGames folder.

src/ServerManager.Common.UnitTests/ZipUtilsUnitTest.cs

@@ -0,0 +1,50 @@
+using System;
+using System.IO;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using ServerManagerTool.Common.Utils;
+
+namespace ServerManager.Common.Tests
+{
+    [TestClass]
+    public class ZipUtilsUnitTest
+    {
+        [TestMethod]
+        public void ZipUtils_()
+        {
+            // Arrange
+            var zipFile = FetchZipFile();
+            var destinationPath = Path.Combine(@"D:\_smtest", Path.GetFileNameWithoutExtension(zipFile));
+            var destinationPath1 = Path.Combine(destinationPath, "SavedArks");
+
+            // Act
+            var count = ZipUtils.ExtractFiles(zipFile, destinationPath1, recurseFolders: false);
+            // Assert
+            Assert.AreEqual(3, count);
+
+            // Act
+            var exists = ZipUtils.DoesFolderExist(zipFile, "SaveGames");
+            // Assert
+            Assert.IsTrue(exists);
+
+            // Act
+            count = ZipUtils.ExtractFiles(zipFile, destinationPath, sourceFolder: "SaveGames", recurseFolders: true);
+            // Assert
+            Assert.AreEqual(6, count);
+
+            // Act
+            exists = ZipUtils.DoesFolderExist(zipFile, "AwesomeTeleporters");
+            // Assert
+            Assert.IsTrue(exists);
+
+            // Act
+            count = ZipUtils.ExtractFiles(zipFile, destinationPath, sourceFolder: "AwesomeTeleporters", recurseFolders: true);
+            // Assert
+            Assert.AreEqual(1, count);
+        }
+
+        private string FetchZipFile()
+        {
+            return @"D:\_smtest\new_theisland_20220501_221004.zip";
+        }
+    }
+}