Intersection of 2D objects

Hello,

as mentioned before I working on a specialized slicer for 3D printing and now I want to slice zero-volume objects (i.e. Faces) to create polylines (or open wires), which would represent my printhead movement. Now I created a sample Face:

```
v0 = cq.Vector(0, 0, 0)
v1 = cq.Vector(10, 5, 5)
v2 = cq.Vector(0, 0, 10)
v3 = cq.Vector(2, 10, 10)
v4 = cq.Vector(10, 7, 5)

e0 = cq.Edge.makeLine(v0, v1)
e1 = cq.Edge.makeLine(v2, v3)

curvedface=cq.Face.makeRuledSurface(e0,e1)
show_object(curvedface)
```

which I would want to slice, for example, at height 2 by using **.section()**

`sect=curvedface.section(2)`

but **.section()** requires a solid object to work. Is there a way to convert my Face to Solid to use **.section()** ? or is there an equivalent of **.intersect()** which could be applied to two Faces (one as shown above and the other one would be a generic flat XY plane) to yield a line?

Thanks for your help.