Show licence in `gleam deps list`

[giacomocavalieri]

In this issue #4219 you said it would be nice to show licences and a link to hexdiff when doing gleam deps list.
So I opened a separate issue for that.
Do you have any ideas on how these information could be presented?

[lpil]

Thinking more about it, I'm not sure having a link to hexpreview is super useful as they can just open it locally? For the licence we could just add it as another column to the table.

[lpil]

Xiao has uncovered that this ticket is harder than I realised- we do not have this information locally. We need to store it at some point during resolution to avoid doing repeat work each time.

We also need special handling for git and path deps.