Ruby gem for working with io_uring

IOU is a Ruby gem for working with the io_uring API. IOU provides a simple and idiomatic API for working with io_uring. IOU does not make any assumptions about the concurrency model in your application. It can be used in multi-threaded, multi-fibered, or callback-based apps. It largely follows the liburing API, but provides certain Ruby-esque amenities to make it easier to use io_uring in Ruby apps.