BCL API review: Consider decoupling options from DI

[divega]

Options was designed to work well with DI, but the only part that really depends directly on DI is the extension methods on IServiceCollection: Configure() and AddOptions(). The idea with this issue is propose we separate those extension methods into a different package from the core of Options which in theory could be used independently of DI, e.g. using code generation.

[HaoK]

There isn't much left in options with the binder moving to Config