Adding new tokens

[gjermundgaraba]

I am trying to figure out how to add another token (MPWR) to the menu, but if I could get some hints to how that works I will try doing it myself and perhaps add some documentation to the readme (if that is wanted). I understand that the chains are pulled automatically from chain-registry (so EmpowerChain is in the list), but not the tokens available (i.e. MPWR token is not available).