Introducing a simple Dagger CI based job which run Supernova against an existing Testnet or Portal Loop chain

• Github Action just recalls a Dagger Module using the Dagger Engine
• Operations expected to be performed by job are all written into a Go package, the Dagger module, that can be tested seamlessly on local machine the same way it run on Github Actions Runner example given
• Editing, enriching and testing the jobs become just another dev task

Note: Currently using test4 as RPC endpoint. Waiting for Test5 to be up again and Supernova's code to be aligned with Portal Loop / Gno master