[Documentation]: Conversation Patterns

[sonichi]

Describe the issue

https://docs.ag2.ai/docs/user-guide/basic-concepts/orchestrations
and
https://docs.ag2.ai/docs/user-guide/advanced-concepts/conversation-patterns-deep-dive
need to be revised to provide a more clear explanation of the built-in patterns.
My view of swarm is that it's a special group chat with a convenient high-level programming interface.

Steps to reproduce

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Additional Information

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