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

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

app/MindWork AI Studio/Tools/Services/ChatLauncherProviderResult.cs

@@ -0,0 +1,11 @@
+using ProviderSettings = AIStudio.Settings.Provider;
+
+namespace AIStudio.Tools.Services;
+
+/// <summary>
+/// The provider a chat started by an assistant chat launcher begins with.
+/// </summary>
+/// <param name="Provider">The provider of the chat, or NONE when there is none to start with.</param>
+/// <param name="IsExplicit">Whether the chat template or the launcher named this provider, as opposed to the chat defaults.</param>
+/// <param name="ErrorMessage">Why the named provider cannot be used, or an empty string when it can.</param>
+internal readonly record struct ChatLauncherProviderResult(ProviderSettings Provider, bool IsExplicit, string ErrorMessage);