Add details about retrieving `vesselID` from `get_vessel_info()`

[AndreaSanchezTapia]

The current examples are run with a known vesselID and we say that the previous function can be used to retrieve it, but we actually have no clear instructions about which of the returned vesselID is the actual correct vesselID

@giselamo can you show us where to find the logic to retrieve the correct vesselID?

cc @natemiller

[AndreaSanchezTapia]

@giselamo @yaaNuamahGFW We can use the list of mmsis from Caitlin and Charlie to check this.

[AndreaSanchezTapia]

• [ ] ~sort $selfReportedInfo by transmissionDateFrom, transmissionDateTo and positionsCounter?~ no - will process the results as little as possible.
• [x] create identity vignette

[AndreaSanchezTapia]

closing as the first version of the id vignette is ready. we can revisit later for improvements.