A unified API to read directory or zip.
Support both nodejs and browser.
You can do read operations for zip or directory in same API:
import { openFileSystem } from "@xmcl/system";
let filePath = "/path/to/dir/"
const fs = await openFileSystem(filePath);
fs.readFile("a.txt"); // read /path/to/dir/a.txt
let zipPath = "/path/to/file.zip"
const fs = await openFileSystem(zipPath);
fs.readFile("a.txt"); // read a.txt in the file.zip!