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

src/nostalgia/core/gba/gfx.cpp

@@ -1,12 +1,13 @@
 /*
- * Copyright 2016 - 2022 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
  */
 
 #include <ox/fs/fs.hpp>
 #include <ox/mc/mc.hpp>
 #include <ox/std/array.hpp>
 
-#include <nostalgia/core/media.hpp>
+#include <nostalgia/foundation/media.hpp>
+#include <nostalgia/core/context.hpp>
 #include <nostalgia/core/gfx.hpp>
 
 #include "addresses.hpp"
@@ -129,7 +130,7 @@ ox::Error initConsole(Context *ctx) noexcept {
 	setBgStatus(ctx, 0b0001);
 	if (!ctx) {
 		ctx = new (ox_alloca(sizeof(Context))) Context();
-		oxRequire(rom, loadRom());
+		oxRequire(rom, foundation::loadRom());
 		ox::FileStore32 fs(rom, 32 * ox::units::MB);
 		auto romFs = new (ox_alloca(sizeof(ox::FileSystem32))) ox::FileSystem32(fs);
 		new (&ctx->rom) ox::UniquePtr<ox::FileSystem>(romFs);