Create a multi-agent framework app that allows users to create AI agents and teams to work together in automating real estate communication tasks, such as calling leads, sending texts and emails, mailing postcards, and setting appointments. The app should integrate Vapi.ai for natural language processing, Twilio.com for voice calls and messaging, AgentiveHub.com for agent management, and n8n.com for workflow automation. Users should be able to create individual AI agents and teams of agents that can collaborate on tasks, including voice calling, emailing, texting, and continuous follow-ups until an appointment is set | A shadcn/ui and v0 generation - v0