What

Add documentation for AgentChat

• Add landing page introducing the concepts of Agents andTeams
• Provide a migration guide with an example of how to implement the basic stock price plot example from autogen 0.2x to AgentChat 0.4x.
• Improve current documentation on Tool Use, showing example on using LangChain Tools
• Add a set of 3 concrete examples implementing workflows with AgentChat
  • Travel Planning
  • Company Research and Report Generation (using web search and custom tools)
  • Academic Literature Review with Arxiv (using web search, and arxiv tools)

Why is this needed?

To help new users rapidly get started with AutoGen