Added retrieval integration, part I (#281)

app/MindWork AI Studio/Tools/RAG/RetrievalTextContext.cs

@@ -0,0 +1,43 @@
+namespace AIStudio.Tools.RAG;
+
+/// <summary>
+/// The retrieval context for text data.
+/// </summary>
+public sealed class RetrievalTextContext : IRetrievalContext
+{
+    #region Implementation of IRetrievalContext
+    
+    /// <inheritdoc />
+    public required string DataSourceName { get; init; }
+    
+    /// <inheritdoc />
+    public required RetrievalContentCategory Category { get; init; }
+    
+    /// <inheritdoc />
+    public required RetrievalContentType Type { get; init; }
+    
+    /// <inheritdoc />
+    public required string Path { get; init; }
+
+    /// <inheritdoc />
+    public IReadOnlyList<string> Links { get; init; } = [];
+
+    #endregion
+
+    /// <summary>
+    /// The text content.
+    /// </summary>
+    /// <remarks>
+    /// Should contain the matched text and some small context around it.
+    /// </remarks>
+    public required string MatchedText { get; set; }
+
+    /// <summary>
+    /// The surrounding content of the matched text.
+    /// </summary>
+    /// <remarks>
+    /// Might give the user some context about the matched text.
+    /// For example, one sentence or paragraph before and after the matched text.
+    /// </remarks>
+    public IReadOnlyList<string> SurroundingContent { get; set; } = [];
+}