Add Yakuza series support

[mosamadeeb]

trafficstars

Requires installing Ryu Mod Manager (a warning is shown if it's missing).

Allows importing existing mods from the game's directory into Mod Organizer, and has proper mod data structure fixing.

Adds support to the following games:

Yakuza 0 Yakuza Kiwami Yakuza Kiwami 2 Yakuza 3 Remastered Yakuza 4 Remastered Yakuza 5 Remastered Yakuza 6 Yakuza: Like a Dragon

[Holt59]

Thanks for the PR, you will need to rebase against master for the latest change and the move to Qt6.

[Silarn]

@SutandoTsukai181 Please see Holt's comment. This should be a relatively simple change but at some point we'll have to close this PR as abandoned.

[Holt59]

Closing for now, feel free to re-open once the changes above have been added to the PR.