tech debt: make a proper udenom package

[danwt]

Base Denom: The original token name on its source chain (e.g., uatom).
Trace: The sequence of IBC transfers (port/channel hops) taken by the token (e.g., transfer/channel-0/transfer/channel-1).
Denom Trace: The concatenation of the trace and the base denom (e.g., transfer/channel-0/transfer/channel-1/uatom).
Hash: The SHA-256 hash of the denom trace, resulting in a unique string representing the full trace.
IBC Denom: The actual token denomination displayed on the receiving chain, which is ibc/{hash}.
raw Denom: a base denom or denom trace

We should use correct terms consistently, our current code in this area is immensely confusing.