Displaying nodes

[liamhuber]

A new node class that has a "display" button to throw a representation into the gui's out_plot. Gets used across all the pyiron nodes that don't actually control exec flow (e.g. loops, the Lammps job...). So now everyone can "display" their output at the push of a button.

Straight from the docstring:

"""
Has a `Display` button that sends a representation over to the `ryven.ironflow.Gui.GUI.out_plot` window.
Display gets locked until the button is pressed again, or another node gets displayed.
While displayed, display updates automatically on changes to input.
"""

Still needs:

• Refactoring (Of course there is always more, but this will do for this PR.)
• Application to the rest of the pyiron nodes

Pre-wired demo attached.

display_proof.json.zip