How to evalcache nvm or fnm

[shubham-cpp]

I would like to cache nvm or fnm.
The thing is for each terminal session the fnm command runs and the node version for that specific terminal session remains different.

Consider I have two terminal sessions one in which i do fnm use 16, now if I go to other terminal session and do fnm use default this will switch the node version for 1st terminal as well