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/RimWorkflowFieldBinding.h

@@ -21,6 +21,8 @@
 #include "cafPdmField.h"
 #include "cafPdmObject.h"
 
+#include <QJsonValue>
+
 class QJsonObject;
 
 class RimWorkflowFieldBinding : public caf::PdmObject
@@ -35,17 +37,17 @@ public:
     void    setDescription( const QString& description );
     void    setRequired( bool required );
 
-    virtual void    applySchema( const QJsonObject& fieldSchema );
-    virtual QString toYamlValue() const = 0;
-    virtual QString displayValue() const;
+    virtual void       applySchema( const QJsonObject& fieldSchema );
+    virtual QJsonValue toJsonValue() const = 0;
+    virtual bool       isObjectReference() const;
+    virtual QString    displayValue() const;
 
     virtual caf::PdmFieldHandle* valueField() = 0;
 
 protected:
     void fieldChangedByUi( const caf::PdmFieldHandle* changedField, const QVariant& oldValue, const QVariant& newValue ) override;
 
-    bool           hasValue() const;
-    static QString yamlQuotedScalar( const QString& value );
+    bool hasValue() const;
 
     caf::PdmField<QString> m_fieldName;
     caf::PdmField<QString> m_description;