Describe actual usage of CosmWasm

[jawoznia]

The CosmWasm docs describe the creation of a product (Smart Contract) but do not explain how to use it in the real world.

I would like to see maybe a separate section like Deployment where we would create a simple but feature-full contract, set up a simple chain, and describe:

• Install the contract on the chain
• Initialize the contract
• Execution, queries, sudos, ...
• Usage of custom messages and custom queries
• And potentially more

All of that with example setups in both contract and chain.