📝 add more package managers (#4533)

docs/mkdocs/docs/integration/macports/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.15)
+project(json_example)
+
+find_package(nlohmann_json CONFIG REQUIRED)
+
+add_executable(json_example example.cpp)
+target_link_libraries(json_example PRIVATE nlohmann_json::nlohmann_json)

docs/mkdocs/docs/integration/macports/example.cpp

@@ -0,0 +1,10 @@
+#include <nlohmann/json.hpp>
+#include <iostream>
+#include <iomanip>
+
+using json = nlohmann::json;
+
+int main()
+{
+    std::cout << std::setw(4) << json::meta() << std::endl;
+}