Pausing OIP simulation

[ali-haj-lb]

Problem:
Using get_tree().paused = true in @tool script bricks all of OIP.
Must use @tool for script to run in editor execution mode (as opposed to runtime mode, which isn't available in OIP afaik)

Solution:
Use EditorInterface.toggle_pause_simulation() instead.

Use case:
my current PLC bricks. I need the physics engine to stop whenever that happens. I'm using a heartbeat integer from my PLC to OIP, and when heartbeat stops, physics pauses.