Ported from upstream's toArabic, including the T, MT, A and MA
numerals. Web saves store spell levels as roman numerals, so the .pqw
importer needs it.
Python 3.10 is the minimum, so annotations use `X | None`, `list[X]`
and friends, enforced by ruff's pyupgrade rules. The remaining typing
names are imported directly, with abstract types coming from
collections.abc. first() is now generic over the item and default.
Dash