Adding IBC tokens denom details

[kwunyeung]

There is currently no way to query IBC token denom details on chain. Although we can query the denom trace of an IBC transfer, it will only show the denom of the token but not the display name and exponent of the tokens.

The most complicated case right now is on Osmosis. We can hard-code to add the detail but this is not a long-term solution. This will happen on all Cosmos chains and we need an efficient way to achieve this.