[nostalgia] Split part of Core out into Foundation, add module system

src/nostalgia/appmodules/CMakeLists.txt

@@ -0,0 +1,20 @@
+add_library(
+	NostalgiaAppModules OBJECT
+		appmodules.cpp
+)
+
+if(NOT MSVC)
+	target_compile_options(NostalgiaAppModules PRIVATE -Wsign-conversion)
+endif()
+
+target_link_libraries(
+	NostalgiaAppModules PUBLIC
+		NostalgiaCore
+)
+
+install(
+	FILES
+		appmodules.hpp
+	DESTINATION
+		include/nostalgia/appmodules
+)

src/nostalgia/appmodules/appmodules.cpp

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#include <ox/std/array.hpp>
+
+#include <nostalgia/foundation/module.hpp>
+
+#include <nostalgia/core/module.hpp>
+
+namespace nostalgia {
+
+void loadModules() noexcept {
+	static bool done = false;
+	if (done) {
+		return;
+	}
+	const ox::Array<foundation::Module*, 1> mods = {
+		&core::CoreModule::mod,
+	};
+	for (const auto m : mods) {
+		foundation::registerModule(m);
+	}
+	done = true;
+}
+
+}

src/nostalgia/appmodules/appmodules.hpp

@@ -0,0 +1,11 @@
+/*
+ * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#pragma once
+
+namespace nostalgia {
+
+void loadModules() noexcept;
+
+}