Add simulator support

[fmorency]

Add CosmosSDK simulator support.

Currently blocked by strangelove-ventures/poa#170 and strangelove-ventures/tokenfactory#11

[fmorency]

The x/manifest module simulation support has proved more challenging than expected because of #21 (comment)

[fmorency]

I was able to make it work with the workaround described in #21 (comment).

However, the determinism simulation fails and I'm still tracking the root cause.

[fmorency]

I fixed the determinism issue and implemented the remaining messages.

[fmorency]

Removing the x/distribution module fixed the crashes I was having.

I'm currently running the simulator with the parameter file defined in strangelove-ventures/poa#170 (comment)

[fmorency]

I ran simulations overnight with the x/distribution module removed. Everything was stable besides the two CosmosSDK issues to be backported to 0.50.8 in cosmos/cosmos-sdk#20897 and cosmos/cosmos-sdk#20909.

I don't know if removing the x/distribution module has any unexpected side effects.

I am currently blocked from trying to make POA work against x/distribution and need help from a POA/CosmosSDK dev to continue. One can track my journey at strangelove-ventures/poa#170.