Initial import of libdpf.

Co-authored-by: Cursor <cursoragent@cursor.com>

thirdparty/json/tests/cuda_example/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.18)
+project(json_cuda LANGUAGES CUDA)
+
+add_executable(json_cuda json_cuda.cu)
+target_include_directories(json_cuda PRIVATE ../../include)
+target_compile_features(json_cuda PUBLIC cuda_std_11)
+set_target_properties(json_cuda PROPERTIES
+    CUDA_EXTENSIONS OFF
+    CUDA_STANDARD_REQUIRED ON
+)

thirdparty/json/tests/cuda_example/json_cuda.cu

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+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.11.2
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+#include <nlohmann/json.hpp>
+
+int main()
+{
+    nlohmann::ordered_json json = {"Test"};
+    json.dump();
+
+    // regression for #3013 (ordered_json::reset() compile error with nvcc)
+    nlohmann::ordered_json metadata;
+    metadata.erase("key");
+}