[nostalgia] Add support for asset UUID headers

src/nostalgia/tools/pack/pack.cpp

@@ -79,7 +79,7 @@ static ox::Error doTransformations(foundation::Context *ctx, ox::TypeStore *ts,
 		oxReturnError(tr(ctx, &buff));
 	}
 	// transform FileAddresses
-	oxRequireM(obj, ox::readClaw(ts, buff));
+	oxRequireM(obj, foundation::readAsset(ts, buff));
 	oxReturnError(transformFileAddressesObj(dest, &obj));
 	oxReturnError(ox::writeClaw(&obj).moveTo(&buff));
 	// write file to dest
@@ -165,7 +165,7 @@ static ox::Error preloadObj(
 		GbaPreloader *pl, ox::CRStringView path) noexcept {
 	// load file
 	oxRequireM(buff, romFs->read(path));
-	oxRequireM(obj, ox::readClaw(ts, buff));
+	oxRequireM(obj, foundation::readAsset(ts, buff));
 	if (obj.type()->preloadable) {
 		oxOutf("preloading {}\n", path);
 		// preload