Include vcpkg manifest file and readme

[csorvagep]

I've included the following file to the repo:

vcpkg.json

{
    "name": "antsimulator",
    "version": "1.0",
    "dependencies": [
        "sfml"
    ]
}

If the toolchain file is set for CMake (e.g. in VSCode) there is no need to install sfml independently. If the toolchain file is not set, then the manifest file is ignored.

I've tested this and worked. I would like to create a pull request for this, but don't see how to include in the readme file. Does anyone have an idea?