feat: Add CrewAI multi-agent social media content generator app

[namanvirk18]

This PR introduces a new multi-agent application using the latest CrewAI syntax. The app enables automatic research, drafting, and simulated publishing of social media content on a user-specified topic.

Features:

• Uses CrewAI's Crew and Flow concepts
• Researcher agent: gathers information on the topic
• Writer agent: drafts social media content
• Publisher agent: simulates publishing (prints and writes to file)
• User specifies topic at runtime

Files Added:

• requirements.txt (crewai>=0.1.0)
• social_media_agent.py (main script)

To run:

pip install -r requirements.txt
python social_media_agent.py "Your Topic Here"

See CrewAI docs: https://docs.crewai.com/introduction