Add vcpkg installation instructions

[NancyLi1013]

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

We also test whether our library ports build in various configurations (dynamic, static) on various platforms (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.

I'm trying to add vcpkg installation instructions but I couldn't find the related docs in code item except for on Wiki page.

Could you please help add the following contents to this port?

Installing and building nana via vcpkg

You can download and install raylib using the vcpkg dependency manager:

  git clone https://github.com/Microsoft/vcpkg.git
  cd vcpkg
  ./bootstrap-vcpkg.sh
  ./vcpkg integrate install
  vcpkg install nana

The nana port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please create an issue or pull request on the vcpkg repository.

Thanks, Nancy