[FEATURE] Please Add Arrow Head In Edge Configuration

I am aware of those examples showing arrow heads with some extra code. But it will be great to have a property in the edge configuration that allows us to add arrow heads on both the ends, one end or none (by default?).

The issue does not name any files, tests, or entry points. Start by locating the edge configuration API and the code that renders edge endpoints, then trace how existing example code adds arrow heads. Done means the configuration supports arrows at either end or neither by default, with coverage for each option.

Written by the indexing model from the issue text.