Include Dependencies in Export

For the Add-On to make sense in everyday use it would be nice to give the option to export dependencies as well.
For Example a Curve is Shrinkwrapped to a surface: When you export the Curve, it exports the Base Surface as well.
Other Example: Surface has boolean modifier. It exports surface + boolean object

Start by tracing the add-on's export path for selected objects, collections, or nodes. Review how the exporter identifies the items currently being exported, then determine where an optional dependency traversal belongs. Done means the option exports referenced dependencies, including a shrinkwrapped curve's base surface and a surface's boolean object, without changing default behavior.

Written by the indexing model from the issue text.