Need support for Per Library Per Platform Core Config

I would like a feature where a can configure a core per library per platform. For example, I’d end up with something like

Library: Mame 2003
Platform: Arcade, Core: mame2003_dylib
Folder: /your/path/here

Library: Mame 2003 Plus
Platform: Arcade, Core: mame2003_plus_dylib
Folder: /your/path/here

Library: FB Neo
Platform: Arcade, Core: fbneo_dylib
Folder: /your/path/here

Right now, I’ve just written a script to change cores, and this weekend I am just going to wire up an iOS IFTTT button for my Today Screen/Widet to change the core. The core change however is global, not library specific.

2023 clean-up: obsolete (Plex Arcade feature has been discontinued for some time)