Add checking of "required features"

[Cashmaney]

Add checking of "required features" like they do in cosmwasm_vm

@reuvenpo could you elaborate on this?

[reuvenpo]

CosmWasm wanted to support the idea chains providing extensions to the base interfaces that they defined. To allow that in a way that will allow maximum cross-chain compatibility, they defined a standard interface for declaring which extensions a contract requires. The idea, as i understand it, that chains won't run contracts that require extensions that they do not support. Most of the related code is here: https://github.com/CosmWasm/cosmwasm/blob/b971c037a773bf6a5f5d08a88485113d9b9e8e7b/packages/vm/src/features.rs but i recommend checking out and browsing their repositories (cosmwasm and go-cosmwasm) to get the full picture. Maybe even ask Ethan and Simon directly.

[assafmo]

This is already happening