[BUG] Documentation on contactMessage is wrong

[jmedellinc]

The README is wrong on the contactMessage data structure.
https://github.com/WhiskeySockets/Baileys?tab=readme-ov-file#non-media-messages

Two changes needed:

• on the vcard string, "N" should be used instead of "FN" (It also helps to exemplify that using semi-colons, one can send first name and last name for the whatsapp app to reccognize)
• on the message data itself, displayName should be inside the vcard object inside of the array of contacts.

Here's the working code:

const vcard = 'BEGIN:VCARD\n' // metadata of the contact card
            + 'VERSION:3.0\n' 
            + 'N:Singh;Jeff \n' // full name
            + 'ORG:Ashoka Uni;\n' // the organization of the contact
            + 'TEL;type=CELL;type=VOICE;waid=911234567890:+91 12345 67890\n' // WhatsApp ID + phone number
            + 'END:VCARD'
const sentMsg  = await sock.sendMessage(
    id,
    { 
        contacts: { 
            contacts: [{ displayName: 'Jeff',  vcard }] 
        }
    }
)

What fails:

• If you follow the sample code in the readme, the card is sent to the user with a generic "Contact" display name. Also, the name is not displayed in the contact card

Thanks