Add support for Inception new Mercury 2 model

[yanismiraoui]

Hello,

I raised a PR a few days ago to add Mercury 2 support: #1060
Mercury 2 is the fastest model out there and it would be great to add support for it here!
Models: https://www.inceptionlabs.ai/models / https://artificialanalysis.ai/models/mercury-2

Thank you very much!