Add CrossMix-OS folder scheme to output tokens

[h1ghb1rd]

Is your feature request related to a problem?

CrossMix-OS output folder scheme seems to be missing from igir.
CrossMix-OS is a custom firmware for the TrimUI Smart Pro.

CrossMix-OS, the OS which elevates your TrimUI Smart Pro to new heights.

CrossMix-OS uses TrimUI Stock user interface with refined configurations, new features, new emulators and new apps. There are so many differences that CrossMix can be considered an dédicated OS in its own right.

Describe the solution you'd like

Please add CrossMix-OS folder scheme to output tokens, the folder structure and it's rules are explained at https://github.com/cizia64/CrossMix-OS/wiki/Emulators .

If a output token that produces a structure like this already is built into igir, please add compatibility note with CrossMix-OS to the documentation.

Additional context

No response