- add: DotNet runtime download

Nebula.UpdateResolver/LogStandalone.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace Nebula.UpdateResolver;
+
+public static class LogStandalone
+{
+    public static Action<string, int>? OnLog;
+    
+    public static void LogError(Exception e){
+        Log($"{e.GetType().Name}: "+ e.Message);
+        Log(e.StackTrace);
+        if(e.InnerException != null) 
+            LogError(e.InnerException);
+    }
+    public static void Log(string? message, int percentage = 0)
+    {
+        if(message is null) return;
+        
+        OnLog?.Invoke(message, percentage);
+    }
+}