Handle non-generic class extensions

[nordlander]

Acton Version

0.29.1.20260817.9.18.51

Steps to Reproduce and Observed Behavior

This fails to find the int(Eq) extension when comparing the item attributes:

class Apa[X](object):
    item: X
    def __init__(self, item: X):
        self.item = item

extension Apa[int] (Eq):
    def __eq__(a, b) -> bool:
        return a.item == b.item

Expected Behavior

Should compile just fine