Unit of Work Generator

[GenerateUnitOfWork] emits a UnitOfWork factory from ordered static step methods.

[GenerateUnitOfWork]
public static partial class CheckoutWork
{
    [UnitOfWorkStep("reserve-inventory", 10, RollbackMethodName = nameof(UndoReserve))]
    private static ValueTask Reserve(CancellationToken ct) => default;

    private static ValueTask UndoReserve(CancellationToken ct) => default;
}

Diagnostics:

ID	Meaning
PKUOW001	Host type must be partial.
PKUOW002	At least one [UnitOfWorkStep] method is required.
PKUOW003	Step methods must return ValueTask and accept one CancellationToken.
PKUOW004	Step names and orders must be unique.