[Feature Request] Create a DivModable trait

[gabrieldemarmiesse]

Review Mojo's priorities

• I have read the roadmap and priorities and I believe this request falls within the priorities.

What is your request?

Create a trait for the __divmod__ method. In its simplest form, it would look like this in a struct:

fn __divmod__(self: Self, other: Self) -> Tuple[Self, Self]

What is your motivation for this change?

Each dunder method has its own trait. We should do it for __divmod__ too.

See #2097 (comment)

Any other details?

While trying to implement it, I encountered a blocking error. See the issue #2597 . It might be a compiler bug, or I might misuse traits.