refactor: make `IntoSorted` an actual crate and reuse it here

[KSXGitHub]

Relevant commit: 2b3fcf1

parallel-disk-usage/tests/_utils.rs

Lines 335 to 367 in 2b3fcf1

	/// Utility methods to sort various types of arrays.
	pub trait IntoSorted<Item>: Sized {
	/// Sort an array by [`Ord`] and return it.
	fn into_sorted(self) -> Self
	where
	Item: Ord;
	/// Sort an array by a function and return it.
	fn into_sorted_by<Order>(self, order: Order) -> Self
	where
	Order: FnMut(&Item, &Item) -> Ordering;
	}
	impl<Item, Array> IntoSorted<Item> for Array
	where
	Array: AsMut<[Item]> + Sized,
	{
	fn into_sorted(mut self) -> Self
	where
	Item: Ord,
	{
	self.as_mut().sort();
	self
	}
	fn into_sorted_by<Order>(mut self, order: Order) -> Self
	where
	Order: FnMut(&Item, &Item) -> Ordering,
	{
	self.as_mut().sort_by(order);
	self
	}
	}