Migrate update system to XML manifest and improve multi-OS support

AlwaysUpToDate.Test/Program.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Threading.Tasks;
+
+namespace AlwaysUpToDate.Test;
+
+internal class Program
+{
+    private static readonly Updater updater = new Updater(new TimeSpan(0, 0, 1), "https://raw.githubusercontent.com/Stone-Red-Code/Test/main/test.xml", true);
+
+    private static async Task Main(string[] args)
+    {
+        updater.ProgressChanged += Updater_ProgressChanged;
+        updater.UpdateAvailable += Updater_UpdateAvailable;
+        updater.NoUpdateAvailable += Updater_NoUpdateAvailable;
+        updater.OnException += Updater_OnException;
+        updater.Start();
+
+        await Task.Delay(-1);
+    }
+
+    private static async void Updater_UpdateAvailable(string version, string changelogUrl)
+    {
+        updater.Stop();
+        Console.WriteLine("New Update available: " + version);
+        if (!string.IsNullOrEmpty(changelogUrl))
+        {
+            Console.WriteLine("Changelog: " + changelogUrl);
+        }
+
+        Console.WriteLine("Do you want to install the new update? (y/n)");
+
+        char input = Console.ReadKey().KeyChar;
+
+        if (char.ToLower(input) == 'y')
+        {
+            await updater.Update();
+        }
+    }
+
+    private static void Updater_ProgressChanged(long? totalFileSize, long totalBytesDownloaded, double? progressPercentage)
+    {
+        Console.WriteLine($"{totalBytesDownloaded}/{totalFileSize}  {progressPercentage}%");
+    }
+
+    private static void Updater_NoUpdateAvailable()
+    {
+        Console.WriteLine("You are up to date!");
+    }
+
+    private static void Updater_OnException(Exception exception)
+    {
+        Console.WriteLine(exception.ToString());
+    }
+}