Added tool calling support (#731)

Co-authored-by: krut_ni <nils.kruthoff@dlr.de>
Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Tools/ToolCallingSystem/MarkdownTruncator.cs

@@ -0,0 +1,20 @@
+namespace AIStudio.Tools.ToolCallingSystem;
+
+internal static class MarkdownTruncator
+{
+    public static string Truncate(string markdown, int maxCharacters)
+    {
+        const string TRUNCATION_MARKER = "[Page content truncated]";
+        if (maxCharacters <= TRUNCATION_MARKER.Length)
+            return markdown[..maxCharacters];
+
+        var contentLimit = maxCharacters - TRUNCATION_MARKER.Length - 2;
+        var breakPosition = markdown.LastIndexOf("\n\n", contentLimit, StringComparison.Ordinal);
+        if (breakPosition < contentLimit / 2)
+            breakPosition = markdown.LastIndexOf('\n', contentLimit);
+        if (breakPosition < contentLimit / 2)
+            breakPosition = contentLimit;
+
+        return $"{markdown[..breakPosition].TrimEnd()}\n\n{TRUNCATION_MARKER}";
+    }
+}