Visualization:better placement of arrows

[skogsbaer]

from wypp import *

@record
class Item:
    name: str

item1 = Item('foo')

@record
class Items:
    items: list[Item]

sampleInvoice = Items([item1])
print(sampleInvoice)

When stepping through the above program, the visualization looks like this:

We should be more clever and place the list between Item and Items