Support SVG report type for concepts and constraints

[hmozaffari]

Currently JQAssistant supports json and csv report types for concepts and constraints. It would be great if it also supports SVG (and PNG). Basically similar to output Neo4j browser offers when running queries. PlantUML plugin kind of support it but it is limited to certain type of diagrams.

[hmozaffari]

I also realized Neo4j browser supports custimized style for rendered graphs and we can customize it either globally or per individual node or relationship:
https://neo4j.com/docs/browser/operations/browser-styling/

If this feature get utilized in JQAssistant, it will be able to render customized graphs.