prune overrideManifest down to just publishInterchainAssetFromBank, and
open-code the boardAux stuff as in start-ibcToken.js here. Note that importing marshal isn't practical in this context, so it may be better to use a fill-in-the-template approach.
This stuff is already on chain.
So all you need is something like add-stATOM.js but
overrideManifestdown to justpublishInterchainAssetFromBank, andboardAuxstuff as instart-ibcToken.jshere. Note that importing marshal isn't practical in this context, so it may be better to use a fill-in-the-template approach.