Generation of Drawio diagrams

Origin	flow/engineering.yml 21:5
Uri	engineering://nasdanika/modules/html/modules/flow/issues/drawio
Target	Flow
Workable

Configuration (properties) for layers and tooltips. For tooltips interpolation. Participant layers instead of grouping. There are also options for role/resource decorations also placed into layers. Perhaps support of custom generators - either exec call or Java service or support of Java service in exec, if not already there - either with a selector or the service method shall indicate whether it generated anything or just pass to all available until returns non-null. Adapting to a generator is another option. Taking a generator from the context is yet another - the most consistent with the current approach. That generator shall use style and properties - default implementation with ability to customize.