Add Data Streams example contract

[andrejrakic]

Combine Data Streams and Log Trigger Automation into one contract example.

• Add this example https://docs.chain.link/data-streams/tutorials/streams-trade/streams-trade-lookup-error-handler#example-code
• Test it with Chainlink Local (pending)

[zeuslawyer]

@andrejrakic lets discuss this when you're back.