Add vcpkg installation instructions

[LilyWangL]

Hyperscan is available as a port in vcpkg, a C++ library manager that simplifies installation for hyperscan and other project dependencies. Documenting the install process here will help users get started by providing a single set of commands to build hyperscan, 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, UWP, ARM) 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.

[hsluoyz]

Hi @LilyWangL , I tried your method. It went smoothly. But it seems to lack some binaries at least:

1. Some release binaries are missing, compared to debug binaries.

2. Both folders lack some binaries like hsbench.exe

3. There's no Visual Studio solution file generated. Can vcpkg generate .sln and project files?

[LilyWangL]

Sorry I am late.
The directory VCPKG_path/buildtrees/hyperscan is used to place the source files and build logs. After building hyperscan, VCPKG outputs the library file and header files in directory VCPKG_path/packages/port_name_triplets.
VCPKG doesn't generate .sln and project files, the customer can use find_package or find_library to use the port in CMake project.