Iterates over the files in a Packwiz index and downloads them concurrently.
The side to download files for (e.g., "client", "server", or "both").
The path to save the downloaded files. Defaults to the current working directory.
The maximum number of concurrent downloads.
A promise that resolves when all files have been downloaded.
Iterates over the files in a Packwiz index and downloads them concurrently.