📝 add documentation for integration via vcpkg

doc/mkdocs/docs/integration/vcpkg/CMakeLists.txt

@@ -0,0 +1,7 @@
+project(json_example)
+cmake_minimum_required(VERSION 2.8.12)
+
+find_package(nlohmann_json CONFIG REQUIRED)
+
+add_executable(json_example example.cpp)
+target_link_libraries(json_example PRIVATE nlohmann_json::nlohmann_json)

doc/mkdocs/docs/integration/vcpkg/example.cpp

@@ -0,0 +1,9 @@
+#include <nlohmann/json.hpp>
+#include <iostream>
+
+using json = nlohmann::json;
+
+int main()
+{
+    std::cout << json::meta() << std::endl;
+}