Rope collision does not work with Rapier2D Physics Engine

[superhighlevel]

As the title says, when using the Default Godot 2D physics engine, the collision works normally, but when changed to the Rapier2D Physics engine, the collision does not work.

[mphe]

Apparently Rapier's implementation of PhysicsDirectSpaceState2D.get_rest_info() does not report any data in editor, only at runtime.
However, I noticed that the collision behavior is pretty broken. Seems like Rapier reports very different data than Godot, at least for shapes other than polygons, even though it promises drop-in compatibility.

So, I'd call this a bug in Rapier.
I don't really want to support two physics systems, especially since the other one is not officially part of Godot.
Feel free to submit a bug report at Rapier, referring to the collisions.tscn example and this issue :)