Add custom status and time builders for flyer_chat widgets

[diegonuja]

Hello,

I'd like to add 2 new builders to the flyer_chat widgets to customize the status icons. The idea behind this is to be able to both change the icons of the message status and to show that a message has been edited next to the icon (like Whatsapp does)

Summary

• Introduces statusBuilder and timeBuilder to all Flyer Chat message widgets.
• Enables full control over the UI and timestamp rendering without forking components.
• Maintains default behavior when builders aren’t provided.

What’s Changed

• Adds optional statusBuilder to render custom delivery status.
• Adds optional timeBuilder to customize timestamp display using provided DateTime .

Here is a quick example on how to use it.

class CustomStatus extends StatelessWidget {
  const CustomStatus({super.key, this.status});

  final MessageStatus? status;

  @override
  Widget build(BuildContext context) {
    return Text('Custom');
  }
}

// ...

return Chat(
  builders: Builders(
    textMessageBuilder: (context, message, index, {required bool isSentByMe, MessageGroupStatus? groupStatus}) {
      return FlyerChatTextMessage(
        message: message,
        index: index,
        statusBuilder: (context, status) => CustomStatus(status: message.status),
      );
    },
  ),
);

Usage Notes

• Both builders are optional; defaults remain unchanged.
• timeBuilder receives the message time for custom formatting or localization.

Backward Compatibility

• No breaking changes; existing UIs continue to render as before.
• Builder callbacks only override specific sections when provided.

I hope this isn't out of scope and could be added to this awesome package. Let me know if you need anything changed.