[nostalgia,studio] Make studio a library

src/studio/applib/include/studioapp/studioapp.hpp

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#pragma once
+
+#include <ox/std/string.hpp>
+
+namespace studio {
+
+int main(
+		const char *appName,
+		ox::String projectDataDir,
+		[[maybe_unused]] int argc,
+		[[maybe_unused]] const char **argv);
+
+}