port(schedulers): ddim

[Trivernis]

No description provided.

[dcvz]

@Trivernis looks like no-std are failing - I added these fairly recently. You'll need to explicitly add some/all of these imports:

use alloc::vec::Vec;
use core::marker::PhantomData;

#[cfg(not(feature = "std"))]
#[allow(unused_imports)]
use num_traits::Float;

[dcvz]

Took changes into #26