Added the informal address to the BeyondFacts Lab (#1176)

app/MindWork AI Studio/Settings/DataModel/AddressFormExtensions.cs

@@ -0,0 +1,27 @@
+using AIStudio.Tools.PluginSystem;
+
+namespace AIStudio.Settings.DataModel;
+
+public static class AddressFormExtensions
+{
+    private static string TB(string fallbackEN) => I18N.I.T(fallbackEN, typeof(AddressFormExtensions).Namespace, nameof(AddressFormExtensions));
+
+    /// <param name="addressForm">The form of address.</param>
+    extension(AddressForm addressForm)
+    {
+        /// <summary>
+        /// Gets the name of the form of address, as the settings show it.
+        /// </summary>
+        /// <remarks>
+        /// The settings offer the choice only in languages which have both forms, so the translations name the
+        /// pronoun of their language, such as "Sie" and "du" in German.
+        /// </remarks>
+        public string Name => addressForm switch
+        {
+            AddressForm.FORMAL => TB("Formal address"),
+            AddressForm.INFORMAL => TB("Informal address"),
+
+            _ => TB("Formal address"),
+        };
+    }
+}