Add Tutorial for AgentChat Docs #459

Job	Run time
lint	26s
test (./packages/autogen-core)	42s
mypy (./packages/autogen-core)	1m 29s
test (./packages/autogen-magentic-one)	53s
pyright (./packages/autogen-core)	28s
mypy (./packages/autogen-magentic-one)	45s
pyright (./packages/autogen-magentic-one)	29s
test (./packages/autogen-ext)	1m 13s
mypy (./packages/agbench)	25s
test (./packages/autogen-agentchat)	24s
mypy (./packages/autogen-ext)	58s
pyright (./packages/agbench)	23s
mypy (./packages/autogen-agentchat)	41s
pyright (./packages/autogen-ext)	25s
pyright (./packages/autogen-agentchat)	24s
check-proto-changes-python	27s
docs (./packages/autogen-core)	33s
format	17s
	11m 22s

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