Gmail Last5

Retrieve and display the sender, subject, and date of the last 5 unique emails in the Gmail inbox using gog.

When the user runs /skill gmail_last5, do this:

1. Run a gog gmail search for the inbox, max 5 newest.
2. Parse the JSON results.
3. Reply with a concise list: sender + subject + date (if present).

Use this command (account may be omitted if default is configured; prefer explicit):

gog gmail search "in:inbox" --max 5 --json --results-only --account [e-mail]

If the command fails, ask the user to confirm which Gmail account is authenticated in gog.