Highlighted code blocks inside the app (#1153)

app/MindWork AI Studio/Tools/CodeHighlighting/CodeToken.cs

@@ -0,0 +1,9 @@
+namespace AIStudio.Tools.CodeHighlighting;
+
+/// <summary>
+/// A part of a code block which gets a color of its own.
+/// </summary>
+/// <param name="Start">Where the part starts in the code.</param>
+/// <param name="Length">How many characters the part spans.</param>
+/// <param name="Kind">What the part is.</param>
+public readonly record struct CodeToken(int Start, int Length, CodeTokenKind Kind);