[nostalgia] Make core::init take FileSystem and return Context, add core::setWindowTitle

src/nostalgia/core/glfw/core.cpp

@@ -37,15 +37,17 @@ static void handleGlfwKeyEvent(GLFWwindow *window, int key, int, int action, int
 	}
 }
 
-ox::Error init(Context *ctx) noexcept {
+ox::Result<Context> init(ox::FileSystem *fs) noexcept {
+	Context ctx;
+	ctx.rom = fs;
 	const auto id = new GlfwImplData;
-	ctx->setWindowerData(id);
+	ctx.setWindowerData(id);
 	using namespace std::chrono;
 	id->startTime = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
 	glfwInit();
-	oxReturnError(initGfx(ctx));
+	oxReturnError(initGfx(&ctx));
 	glfwSetKeyCallback(id->window, handleGlfwKeyEvent);
-	return OxError(0);
+	return ctx;
 }
 
 ox::Error run(Context *ctx) noexcept {