Add CadSearchGui: WinForms app to index and search the CAD archive

Indicizza le cartelle __Accessori, __B.end, __Corpi, __Fondi in un DB
SQLite locale ed espone una GUI di ricerca (codice, tipo, cartella,
solo ultima versione) con aggiornamento incrementale dell'indice e
stima del tempo rimanente.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

CadSearchGui/Program.cs

@@ -0,0 +1,16 @@
+namespace CadSearchGui;
+
+static class Program
+{
+    /// <summary>
+    ///  The main entry point for the application.
+    /// </summary>
+    [STAThread]
+    static void Main()
+    {
+        // To customize application configuration such as set high DPI settings or default font,
+        // see https://aka.ms/applicationconfiguration.
+        ApplicationConfiguration.Initialize();
+        Application.Run(new Form1());
+    }    
+}