Updated README

include/builder/json_file_builder.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <nlohmann/json.hpp>
+
+namespace builder {
+    class JsonFileBuilder : public IFileBuilder {
+    public:
+        std::string get_extension() noexcept override {
+            return "json";
+        }
+
+        void write_top_level(std::ofstream& output) noexcept override {
+            // Nothing needed here.
+        }
+
+        void write_namespace(std::ofstream& output, const std::string& namespace_name) noexcept override {
+            current_namespace_name_ = namespace_name;
+        }
+
+        void write_variable(std::ofstream& output, const std::string& variable_name, const std::uint64_t variable_value) noexcept override {
+            json[current_namespace_name_][variable_name] = variable_value;
+        }
+
+        void write_closure(std::ofstream& output, const bool eof) noexcept override {
+            if (eof) {
+                output << json.dump(4);
+
+                json.clear();
+            }
+        }
+
+    public:
+        nlohmann::json json;
+
+    private:
+        std::string current_namespace_name_;
+    };
+}