Run cmake-init and setup flake.nix and default.nix

source/lib.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <string>
+
+/**
+ * @brief The core implementation of the executable
+ *
+ * This class makes up the library part of the executable, which means that the
+ * main logic is implemented here. This kind of separation makes it easy to
+ * test the implementation for the executable, because the logic is nicely
+ * separated from the command-line logic implemented in the main function.
+ */
+struct library
+{
+  /**
+   * @brief Simply initializes the name member to the name of the project
+   */
+  library();
+
+  std::string name;
+};