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

app/SharedTools/I18NSourceText.cs

@@ -1,9 +1,10 @@
 namespace SharedTools;
 
 /// <summary>
-/// A text of T() or TB() which the I18N collector found in a source file.
+/// A text of T(), TB(), or TA() which the I18N collector found in a source file.
 /// </summary>
 /// <param name="Offset">Where its literal starts in the file.</param>
 /// <param name="Length">How many characters its literal takes in the file.</param>
 /// <param name="Text">The string the compiler makes of the literal.</param>
-public sealed record I18NSourceText(int Offset, int Length, string Text);
+/// <param name="HasAddressVariants">Whether the text comes from TA(), i.e., addresses the reader and gets a variant with the informal address, see I18NAddressVariant.</param>
+public sealed record I18NSourceText(int Offset, int Length, string Text, bool HasAddressVariants);