create a setup builder impl from MicaSetup

Build/MicaSetup/Helper/SimpleDownloadHelper.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Net;
+
+namespace MicaSetup.Helper;
+
+public static class SimpleDownloadHelper
+{
+    public static bool DownloadFile(string address, string fileName, DownloadProgressChangedEventHandler callback = null!)
+    {
+        try
+        {
+            using WebClient client = new();
+            client.DownloadProgressChanged += (sender, e) =>
+            {
+                Logger.Debug($"[DownloadFile] {address} saved to '{fileName}', {e.ProgressPercentage}% completed.");
+                callback?.Invoke(sender, e);
+            };
+
+            client.DownloadFile(address, fileName);
+            return true;
+        }
+        catch (Exception e)
+        {
+            Logger.Error(e);
+        }
+        return false;
+    }
+}