Add README blurb to help get started

src/content/code/language-support/c-c/tools/cppgraphqlgen.md

@@ -4,3 +4,12 @@ description: A C++20 GraphQL schema service and client generator.
 url: https://github.com/microsoft/cppgraphqlgen
 github: microsoft/cppgraphqlgen
 ---
+
+The easiest way to build and install `cppgraphqlgen` is to use [microsoft/vcpkg](https://github.com/microsoft/vcpkg).
+See the [Getting Started](https://github.com/microsoft/vcpkg#getting-started) section of the `vcpkg` README
+for details. Once you have that configured, run `vcpkg install cppgraphqlgen` (or `cppgraphqlgen:x64-windows`,
+`cppgraphqlgen:x86-windows-static`, etc. depending on your platform). That will build and install all of the
+dependencies for `cppgraphqlgen`, and then build `cppgraphqlgen` itself without any other setup. The `cppgraphqlgen`
+package (and its dependencies) are advertised to the `CMake` `find_package` function through the
+`-DCMAKE_TOOLCHAIN_FILE=<...>/scripts/buildsystems/vcpkg.cmake` parameter/variable. There are more details about
+this in the `vcpkg` documentation.