readGgufMetadataFile function
Web stub: there is no filesystem to read from.
Web hosts slice their blob and call readGgufMetadata directly.
Implementation
Future<GgufMetadataResult> readGgufMetadataFile(
String path, {
required Set<String> keys,
}) async {
throw UnsupportedError(
'readGgufMetadataFile requires dart:io; on the web, read the blob '
'prefix and call readGgufMetadata instead.',
);
}