[Documentation]: Simulator parameter file example

[fmorency]

Summary

I would love to see an example of a complete parameter file with both module and simulation parameters. I can change the simulation weights, as described in https://github.com/cosmos/cosmos-sdk/blob/d426a5db677506a981cb094249bb6eaaf6324d39/simapp/params/doc.go, but not module parameters, e.g., mint.params.bond_denom