Added smart form. Added smart select

Moonlight/App/Helpers/FieldCssHelper.cs

@@ -0,0 +1,11 @@
+using Microsoft.AspNetCore.Components.Forms;
+
+namespace Moonlight.App.Helpers;
+
+public class FieldCssHelper : FieldCssClassProvider
+{
+    public override string GetFieldCssClass(EditContext editContext, in FieldIdentifier fieldIdentifier)
+    {
+        return editContext.GetValidationMessages(fieldIdentifier).Any() ? "is-invalid" : "is-valid";
+    }
+}