Allow retrieving a specific field from a specific entry

[dcastro]

As per the MVP spec, coffer view displays a tree of 1 or more entries found under a specified path.

However, we'd like to have a way of outputting a single field from a single entry, so that it can be more conveniently copied to the clipboard (e.g. by piping to wl-copy).

We should discuss what the command/options should look like in order to support this feature.

[dcastro]

I ended up making coffer view support this use case, so I'm closing this ticket.

It works like this now:

• coffer view /dir - displays a tree with multiple directories/entries and all their fields
• coffer view /dir password - displays a tree with multiple directories/entries, but entries that don't have a password field are filtered out
• coffer view /dir/entry - displays a single entry and all its fields
• coffer view /dir/entry password - displays only the value of the password field of the /dir/entry entry.