Expose device path types

[gil0mendes]

This fix allows to expose the DeviceType and DeviceSubType enumerations.

I'm also thinking about moving the device_path modules outside loader_image since, on the UEFI specification, those are two separated protocols. What are your thoughts on this?

Edit
Here we can see a usage example of the AcpiDevicePath in use.

[GabrielMajeri]

I'm also thinking about moving the device_path modules outside loader_image since, on the UEFI specification, those are two separated protocols.

Yep, makes sense. Initially it was only used internally in the loaded_image protocol, but it might be useful in other cases as well.

[gil0mendes]

@GabrielMajeri I think it's ready for you to take a look 🤗

[GabrielMajeri]

The code looks good, just a few small nitpicks!

[GabrielMajeri]

Thanks for your contribution!