Add vcpkg installation instructions

[JonLiu1993]

liburing is available as a port in vcpkg, a C++ library manager that simplifies installation for liburing and other project dependencies. Documenting the install process here will help users get started by providing a single set of commands to build liburing, ready to be included in their projects.

We also test whether our library ports build in various configurations (dynamic, static) on various platforms (OSX, Linux, Windows: x86, x64) to keep a wide coverage for users.

I'm a maintainer for vcpkg, and here is what the port script looks like. We try to keep the library maintained as close as possible to the original library. :)

[ammarfaizi2]

Please follow the pull request guidelines.

[axboe]

@JonLiu1993 Can you update the commit? You need to follow the commit guidelines of this repo, most importantly you need to add a Signed-off-by line to your commit message with your real name and email.

[axboe]

Closing due to inactivity.