Support for GameModDescriptor files in Game List.

[AdmiralCurtiss]

Someone more familiar with how the game list cache works please check if this is correct.

TODO:

• Sensible Netplay hash calculation.
• The temporary Netplay NAND interacts very poorly with savegame redirection.

[JosJuice]

If you add json here, your feature will probably work in the Android game list without any further changes:

dolphin/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/FileBrowserHelper.java

Line 33 in ffdc853

"gcm", "tgc", "iso", "ciso", "gcz", "wbfs", "wia", "rvz", "wad", "dol", "elf"));

(Well, work barring scoped storage... But this would be kind of a power user feature anyway, at least on Android.)

[JMC47]

Tested. Launches correctly from Gamelist and Netplay.

[JosJuice]

Like with the original Riivolution PR: I would appreciate if @leoetlino could look at the save redirection part, but the rest LGTM.

[leoetlino]

Mostly LGTM, just one minor complaint.

[leo60228]

Is there a way to set the Maker in addition to the name and banner?

[leo60228]

An HBC-style XML file works, but I feel like it'd make sense to have a field in the JSON.

[AdmiralCurtiss]

Yeah we can probably add that, should be easy enough.