Drag & Drop view

[adlerfaulkner]

Implement "Drag & Drop" view.

This view gets shown when you click the "Drag & Drop" button in the header of the main center panel of the UI.

Should include:

• A draggable box representing the input schema
  • Each field should be listed with a name and a type (string, number, boolean, etc.)
  • Nested fields should be indented
• A draggable box representing output schema
  • Ability to add (via a + button) fields to the output schema and fill in their name and type (RDF data types)
• Ability to set the iterator of the logicalSource of the mapping
• Ability to click and drag from an input schema field to the output schema

Any action performed via the drag & drop view should update the mapping state in the top level RMLMappingEditor component.

Rough mockup: