modify query balance

[akhilkumarpilli]

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closes: #459

[colin-axner]

I don't think we can assume an account only has IBC tokens. We need to check if the prefix of the coin is ibc/. I added an issue on ibc-go since there should be a helper function for this

It also seems odd to me that we need to parse out ibc before doing the QueryDenomTrace, so I added another issue

I'm okay actually closing this issue and leaving the code as is until we fix the above issues upstream. I'd like a function that looks something like this:

for _, c := range coins {
    if IsIBCDenom(c.Denom) {
        dt, err := chain.QueryDenomTrace(c.Denom)
        if err != nil {
            return fmt.Errorf("unregistered token in balance")
        }
        
        out = append(out, NewToken(dt.DenomTrace.GetFullDenomPath(), c.Amount)
    } else {
         out = append(out, c)
    }
}