use of C++23 code

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

components/storage/include/storage/storage.h

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+// MIT License
+// Copyright (c) 2026 by Peter Siegmund (mars3142)
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#pragma once
+
+#include "storage/storage_error.h"
+
+#include <expected>
+#include <string>
+#include <vector>
+
+namespace storage {
+
+class Storage {
+public:
+  /**
+   * Liest eine Datei von einem Pfad.
+   * @param path Der Dateipfad.
+   * @return Ein expected mit den Dateidaten oder einem StorageError.
+   */
+  [[nodiscard]] std::expected<std::vector<uint8_t>, StorageError> readFile(
+      const std::string &path) const;
+
+  /**
+   * Schreibt Daten in eine Datei.
+   * @param path Der Dateipfad.
+   * @param data Die zu schreibenden Daten.
+   * @return Ein expected<void> oder einem StorageError.
+   */
+  [[nodiscard]] std::expected<void, StorageError> writeFile(
+      const std::string &path,
+      const std::vector<uint8_t> &data) const;
+};
+
+} // namespace storage

components/storage/include/storage/storage_error.h

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+// MIT License
+// Copyright (c) 2026 by Peter Siegmund (mars3142)
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#pragma once
+
+namespace storage {
+
+enum class StorageError {
+  FileNotFound,
+  ReadError,
+  WriteError,
+};
+
+} // namespace storage