Simplify README (#4712) #3246

Job	Run time
check-proto-changes-python	1m 5s
codecov (./packages/autogen-core)	1m 0s
docs (./packages/autogen-core)	1m 28s
codecov (./packages/autogen-magentic-one)	1m 48s
codecov (./packages/autogen-ext)	2m 52s
docs-example-check (./packages/autogen-core)	2m 41s
codecov (./packages/autogen-agentchat)	1m 5s
format	58s
markdown-code-lint	2m 7s
lint	49s
mypy (./packages/autogen-core)	2m 4s
pyright (./packages/autogen-core)	54s
samples-code-check	1m 2s
mypy (./packages/autogen-magentic-one)	1m 4s
pyright (./packages/autogen-magentic-one)	56s
mypy (./packages/agbench)	1m 5s
pyright (./packages/agbench)	53s
test (./packages/autogen-core)	1m 6s
mypy (./packages/autogen-ext)	1m 58s
pyright (./packages/autogen-ext)	1m 1s
test (./packages/autogen-magentic-one)	1m 28s
mypy (./packages/autogen-agentchat)	1m 2s
pyright (./packages/autogen-agentchat)	54s
test (./packages/autogen-ext)	2m 45s
mypy (./packages/magentic-one-cli)	53s
pyright (./packages/magentic-one-cli)	2m 3s
test (./packages/autogen-agentchat)	1m 8s
	38m 9s

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