Added backups of all data, restorable on another computer (#1008)

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

app/MindWork AI Studio/Tools/ChatArchive/ChatArchiveManifestChat.cs

@@ -0,0 +1,17 @@
+namespace AIStudio.Tools.ChatArchive;
+
+/// <summary>
+/// One chat in a backup.
+/// </summary>
+public sealed record ChatArchiveManifestChat
+{
+    /// <summary>
+    /// The unique identifier of the chat.
+    /// </summary>
+    public Guid ChatId { get; init; }
+
+    /// <summary>
+    /// The name of the chat when the backup was made.
+    /// </summary>
+    public string Name { get; init; } = string.Empty;
+}