layout source from main

src/app/app_state.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <filesystem>
+#include <nlohmann/json.hpp>
+
+namespace lm {
+
+struct AppState
+{
+  std::filesystem::path data_path;
+  nlohmann::json state;
+};
+
+}  // namespace lm