Extract common logic between blocks and search transactions

[piotr-iohk]

There is a common logic especially with regards to how transaction operations are generated from "database" types like InternalCommand, UserCommand or ZkAppCommand. The block database types (like InternalCommandMetadata) are slightly different than search types (InternallCommand) and they also ultimately transform to slightly different response types, however the logic for generating operations is the same or very similar.

I believe that the way to approach it could be to create a common trait for each type e.g. InternalCommandOperations (including fn generate_operations()) and implement it for each respective type.