dividing a tomlkit.Integer by an int does integer division, instead of 'true' division

[anthrotype]

Something is up with the tomlkit wrapper for built-in int type. Using the / division operator between integers in python 3 should use __truediv__ and thus return a float, not an int... But if I divide a tomlkit Integer with another int, I get an int, as if it were truncated or doing integer division (//). I don't know why...

>>> from tomlkit.items import item, Integer
>>> i = item(1)
>>> assert type(i) is Integer
>>> v = i / 2
>>> assert type(v) is Integer  # should it not be a float?!
>>> print(v)  # that's wrong, should be 0.5
0
>>> assert v == 0.5
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AssertionError

And if one attempts to extract a float from this tomlkit Integer, one gets a very weird error deep from the numbers module which makes no sense to me:

>>> float(v)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/google/home/clupo/.linuxbrew/lib/python3.11/numbers.py", line 381, in __float__
    return float(int(self))
                 ^^^^^^^^^
TypeError: __int__ returned non-int (type float)

If I unwrap this weird v.unwrap()... I get the float back, 0.5 ...
It's like after truediv the Integer wrapper is in fact wrapping a float.
This makes tomlkit entirely unusable for us as we can't no longer trust that an int is an int and a float a float.

[anibali]

This is quite a big issue, we've had to downgrade to tomlkit 0.11.8 as a workaround. After some brief investigation I believe that the issue was introduced in 0.12.0 with this PR: #307