Big code changes

engine/src/application.cpp

@@ -0,0 +1,25 @@
+#include <sophia/application.hpp>
+
+#include "engine.hpp"
+
+namespace sophia {
+
+class Application::Impl {
+ public:
+  Impl(const Application::Config& config)
+      : engine{{config.width, config.height, config.name}} {}
+
+  void run() { engine.run(); }
+
+ private:
+  Engine engine;
+};
+
+Application::Application(const Config& config)
+    : impl{std::make_unique<Impl>(config)} {}
+
+Application::~Application() = default;
+
+void Application::run() { impl->run(); }
+
+}  // namespace sophia