Workflows: Add interactive editor for taskmaestro workflows

Build, copy and edit taskmaestro workflows in ResInsight and save them as
standard workflow.yaml + input.yaml.

- Python helper: catalog, load, save and export-registered subcommands,
  and run --registered for installed workflows
- C++ definition model with pure edit operations, port type checks,
  config field derivation, static validation and undo/redo
- Installed folder listing registered workflows (read-only, runnable,
  can be duplicated)
- Graph editor dock with task palette, drag-to-connect, context menus,
  automatic layout and debounced live validation
- New/Duplicate/Save/Save As/Rescan commands; unsaved edits run from a
  temporary folder and prompt before being discarded
- Update the design document and the user README

ApplicationLibCode/ProjectDataModel/Workflow/RimWorkflowInstalledCollection.h

@@ -0,0 +1,33 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2026     Equinor ASA
+//
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+//
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+#pragma once
+
+#include "RimWorkflow.h"
+
+#include "cafPdmObjectCollection.h"
+
+//==================================================================================================
+/// Workflows registered by installed Python packages (read-only)
+//==================================================================================================
+class RimWorkflowInstalledCollection : public caf::PdmObjectCollection<RimWorkflow>
+{
+    CAF_PDM_HEADER_INIT;
+
+public:
+    RimWorkflowInstalledCollection();
+};