Add Whitelist CSM sync mods in compatibility checker

[bonsaibauer]

I built a Addon mod that syncs Traffic Manager: President Edition (TM:PE) across Cities: Skylines Multiplayer (CSM) — without any code changes in either TM:PE or CSM! 🎉

👉 Try it here: https://steamcommunity.com/sharedfiles/filedetails/?id=3600743038

please add known to work with mod classification for CSM, the original ticket: #1787
and
#1654

[krzychu124]

HI,
from what I understood CSM can be considered compatible only if your CSM.TmpeSync mod is installed and enabled and this change doesn't test that (though as you mentioned in readme the Timed traffic lights are not supported (yet?)) .

Anyways, TMPE incompatibility detection doesn't do anything other than notifying the user, it's purely informational, so if someone still wants to use CSM, the mod won't hinder them in any way.