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/RimWorkflowArrayBinding.h

@@ -27,8 +27,8 @@ class RimWorkflowArrayBinding : public RimWorkflowFieldBinding
 public:
     RimWorkflowArrayBinding();
 
-    void    applySchema( const QJsonObject& fieldSchema ) override;
-    QString toYamlValue() const override;
+    void       applySchema( const QJsonObject& fieldSchema ) override;
+    QJsonValue toJsonValue() const override;
 
     caf::PdmFieldHandle* valueField() override { return &m_value; }