[UX] Add support for wiki links in known fixes to display in game details page

[arielj]

This PR adds support of adding a wiki page link in the known fixes repo so we can display it in the game page of a game to show the user there's known information they should read about that particular game.

This example is for Heroes of Might and Magic 3 Complete that (currently) needs a fix that we can't automate for the game to open, so we can point to the detail in our Wiki:

• known fix entry https://github.com/Heroic-Games-Launcher/known-fixes/blob/main/gog/1207658787-gog.json
• our Wiki link: https://github.com/Heroic-Games-Launcher/HeroicGamesLauncher/wiki/Game-Workarounds#heroes-of-might-and-magic-3-complete-from-gog

This way users can find out known solutions and workarounds without having to do the research or ask on discord.

Since Wiki pages can also be useful for Windows games (like the Bethesda games reg fix on Windows), I updated the code to download the known-fixes files also on Windows. There's no risk of the other fixes running on windows because they only run after a new prefix is created.

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Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[flavioislima]

That is useful 🔥