Added a way to read what the AI received from your sources (#1100)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Tools/Services/Indexing/ChunkSpan.cs

@@ -0,0 +1,8 @@
+namespace AIStudio.Tools.Services.Indexing;
+
+/// <summary>
+/// Where a chunk starts and where it ends in its document, cf. TextChunker.Locate.
+/// </summary>
+/// <param name="Start">Where the chunk starts.</param>
+/// <param name="End">Where the chunk ends.</param>
+internal readonly record struct ChunkSpan(SourceLocation Start, SourceLocation End);