qbittorrent-portable: add

[Skrity]

No description provided.

[Ash258]

I would wait for one of these is merged: qbittorrent/qBittorrent#9584 qbittorrent/qBittorrent#9349 and then add qbittorrent-portable to extras, keeping nonportable available

[Skrity]

I see merit in keeping qbittorrent intact if only for compatibility with previous installations.
As for portability: I imagine that env_set will break installation of qbittorrent alongside qbittorrent-portable, maybe something like this can work meanwhile we wait for a proper portable edition?

    "bin": [ 
        [
            "qbittorrent.exe",
            "qbittorrent",
            "--portable" 
        ]
    ],
    "shortcuts": [
        [
            "qbittorrent.exe",
            "qBittorrent",
            "--portable" 
        ]
    ],

[Ash258]

I use this method inside my bucket:
https://github.com/Ash258/scoop-Ash258/blob/master/bucket/qBittorrent.json