Added profile, provider, and workspace preselection to chat templates (#1099)

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

app/MindWork AI Studio/Settings/ChatTemplateDataSourceChoice.cs

@@ -0,0 +1,16 @@
+using AIStudio.Settings.DataModel;
+
+namespace AIStudio.Settings;
+
+/// <summary>
+/// Whose data source options a chat started by a launcher begins with, decided by ChatTemplate.ChooseDataSourceOptions.
+/// </summary>
+/// <param name="Options">The options to start with, or null when neither side names any, which leaves the chat default in place.</param>
+/// <param name="LauncherChoiceDropped">Whether the data sources the launcher names itself were dropped for the options of the chat template.</param>
+public readonly record struct ChatTemplateDataSourceChoice(DataSourceOptions? Options, bool LauncherChoiceDropped)
+{
+    /// <summary>
+    /// Neither side names any data sources, so the chat keeps its default options.
+    /// </summary>
+    public static readonly ChatTemplateDataSourceChoice NONE = new(null, false);
+}