Allow installation of GOG Goddies

[Willow0349]

Problem description

Some games on GOG include other games as Goodies ex. Falcon 4.0 included as a goodie for falcon gold (https://www.gog.com/en/game/falcon_gold)

Feature description

Allow installation of goodies for games on GOG

Alternatives

Make a hard coded list of games on GOG that are included as goodies and handle them on a case by case basis depending on the number of cases.

Additional information

No response

[imLinguin]

Each game can be handled completely differently. I imagine this particular game would be better off being treated as a separate title. I would recommend using manual Add Game feature for this case.

Goodies are generally soundtracks and manuals.
I don't see a reason to introduce such feature for one game. Heroic doesn't work on offline installers in the first place