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/PluginSystem/PluginConfigurationObjectDescriptor.cs

@@ -0,0 +1,54 @@
+using AIStudio.Settings.DataModel;
+
+using Lua;
+
+namespace AIStudio.Tools.PluginSystem;
+
+/// <summary>
+/// Describes one type of configuration object which configuration plugins provide, such as LLM
+/// providers or chat templates.
+/// </summary>
+/// <remarks>
+/// Whatever treats every type of configuration object alike goes through these descriptors, so that
+/// none of these places can forget a type: reading the objects from a configuration plugin, removing
+/// those a plugin no longer defines, and leaving all of them out of a backup. A new type of
+/// configuration object needs a descriptor in PluginConfigurationObjectDescriptors, and every such place
+/// handles it.
+/// </remarks>
+public abstract class PluginConfigurationObjectDescriptor
+{
+    /// <summary>
+    /// The type of the configuration objects.
+    /// </summary>
+    public abstract PluginConfigurationObjectType Type { get; }
+
+    /// <summary>
+    /// Reads the configuration objects of this type which a configuration plugin defines, and stores
+    /// them in the settings unless the plugin is only checked.
+    /// </summary>
+    /// <param name="mainTable">The main table of the configuration plugin.</param>
+    /// <param name="configPluginId">The configuration plugin.</param>
+    /// <param name="configObjects">The list to which every object read is added.</param>
+    /// <param name="dryRun">Whether the plugin is only checked, e.g., before an import. Nothing is stored then.</param>
+    /// <param name="pluginPath">The directory of the plugin, which paths in the objects are relative to.</param>
+    /// <returns>True when the plugin defines a table for this type.</returns>
+    public abstract bool TryParse(LuaTable mainTable, Guid configPluginId, List<PluginConfigurationObject> configObjects, bool dryRun, string pluginPath);
+
+    /// <summary>
+    /// Removes the configuration objects of this type which belong to a configuration plugin that is
+    /// gone or no longer defines them, along with their secrets and tokenizers.
+    /// </summary>
+    /// <param name="availablePlugins">The plugins AI Studio found.</param>
+    /// <param name="deployedEnterpriseConfigPluginIds">The configuration plugins an organization deployed, including those which could not be loaded.</param>
+    /// <param name="notStartedConfigPluginIds">The configuration plugins which were loaded, but did not start.</param>
+    /// <param name="configObjectList">The configuration objects all running configuration plugins define.</param>
+    /// <returns>True when the settings changed.</returns>
+    public abstract Task<bool> CleanLeftOverAsync(IList<IAvailablePlugin> availablePlugins, IReadOnlySet<Guid> deployedEnterpriseConfigPluginIds, IReadOnlySet<Guid> notStartedConfigPluginIds, IList<PluginConfigurationObject> configObjectList);
+
+    /// <summary>
+    /// Removes the configuration objects of this type which a configuration plugin manages.
+    /// </summary>
+    /// <param name="settings">The settings to change, e.g., a copy for a backup. Never the settings AI Studio runs with.</param>
+    /// <returns>How many objects were removed.</returns>
+    public abstract int RemovePluginObjects(Data settings);
+}