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/ChatArchiveFormat.cs

@@ -0,0 +1,33 @@
+using AIStudio.Tools.DataBackup;
+
+namespace AIStudio.Tools.ChatArchive;
+
+/// <summary>
+/// Where a backup keeps its chats, for adding them to the chats there are.
+/// </summary>
+/// <remarks>
+/// A backup holds the chats in the layout of the data folder, cf. DataBackupFormat: every chat in a
+/// directory of its own, below its workspace or among the temporary chats.
+/// </remarks>
+public static class ChatArchiveFormat
+{
+    /// <summary>
+    /// Where a backup keeps the workspaces, each in a directory named after its ID.
+    /// </summary>
+    public static readonly string WORKSPACES_PREFIX = DataBackupFormat.DATA_ROOT + DataBackupContents.ENTRIES.First(entry => entry.Kind is DataBackupEntryKind.WORKSPACES).RelativePath;
+
+    /// <summary>
+    /// Where a backup keeps the temporary chats, each in a directory named after its ID.
+    /// </summary>
+    public static readonly string TEMPORARY_CHATS_PREFIX = DataBackupFormat.DATA_ROOT + DataBackupContents.ENTRIES.First(entry => entry.Kind is DataBackupEntryKind.TEMPORARY_CHATS).RelativePath;
+
+    /// <summary>
+    /// The file storing the workspace or chat name.
+    /// </summary>
+    public const string NAME_FILE_NAME = "name";
+
+    /// <summary>
+    /// The file storing the serialized chat thread.
+    /// </summary>
+    public const string THREAD_FILE_NAME = "thread.json";
+}