Handling different pool asset's relative value scale

[iboss-ptk]

In case where we want transmuter to support asset configuration that is not only 1:1, for example:

$$ X_{exponent} = 10^6 $$

$$ Y_{exponent} = 10^{12} $$

we want to create X:Y transmuter pool. so looking at this.

$$ 1 X = 10^6 uX $$

$$ 1 Y = 10^{12} uY $$

Meaning 1 uX should be traded for 10^6 uY.

We introduce normalization factor, similar to how stableswap handles the same case but called it scaling factor.

(note: I think scaling factor term is a bit misleading due to the term scaling implies multiplication but is used for division, so I think normalization factor fits the intent better)

The said factor can be set per denom, so X and Y has normalization_factor of 1 and 10^6 respectively, then we can normalize them via raw_coin_units / normalization_factor.

The factor is calculated by:

$$ \frac{denom_{exponent}}{GCD_{i=0}^{n}(denom_i)} $$

Now that to trade 1 X for 1 Y we normalized them by normalization_factor

$$ \frac{10^6 uX}{1} = 10^6 nuX $$

$$ \frac{10^{12} uY}{10^6} = 10^6 nuY $$

Thus normalized asset is now 1:1.

We can store only normalization factor, since with that, it also allows different transmuting ratio.

[iboss-ptk]

closed by #28