Fix gestione allegati e creato metodo di esportazione log

SteUp.Maui/Core/Logger/FileLoggerProvider.cs

@@ -0,0 +1,14 @@
+using Microsoft.Extensions.Logging;
+
+namespace SteUp.Maui.Core.Logger;
+
+public class FileLoggerProvider(string path, string logFilePrefix, int retentionDays = 60) 
+    : ILoggerProvider
+{
+    public ILogger CreateLogger(string categoryName)
+    {
+        return new FileLogger(path, logFilePrefix, categoryName, retentionDays);
+    }
+
+    public void Dispose() { }
+}