Display a big database size warning

Auto rename additional field when it matches standard
Treated all fields as new Field class
Added the Is Protected property

ModernKeePass.Domain/Entities/FieldEntity.cs

@@ -0,0 +1,9 @@
+namespace ModernKeePass.Domain.Entities
+{
+    public class FieldEntity
+    {
+        public string Name { get; set; }
+        public string Value { get; set; }
+        public bool IsProtected { get; set; }
+    }
+}