Add python version requirement to frontpage and readme (#5014) #3364

Job	Run time
check-proto-changes-python	1m 16s
codecov (./packages/autogen-core)	1m 7s
docs (./packages/autogen-core)	1m 32s
codecov (./packages/autogen-magentic-one)	2m 0s
codecov (./packages/autogen-ext)	2m 49s
docs-example-check (./packages/autogen-core)	2m 28s
format	57s
codecov (./packages/autogen-agentchat)	1m 11s
lint	48s
markdown-code-lint	1m 56s
mypy (./packages/autogen-core)	2m 18s
pyright (./packages/autogen-core)	1m 4s
mypy (./packages/autogen-magentic-one)	1m 5s
samples-code-check	1m 5s
pyright (./packages/autogen-magentic-one)	57s
mypy (./packages/agbench)	57s
test (./packages/autogen-core)	1m 1s
pyright (./packages/agbench)	1m 4s
test (./packages/autogen-magentic-one)	1m 28s
mypy (./packages/autogen-ext)	1m 55s
pyright (./packages/autogen-ext)	1m 10s
test (./packages/autogen-ext)	2m 44s
mypy (./packages/autogen-agentchat)	1m 23s
pyright (./packages/autogen-agentchat)	55s
test (./packages/autogen-agentchat)	1m 6s
mypy (./packages/magentic-one-cli)	1m 8s
pyright (./packages/magentic-one-cli)	1m 3s
	38m 27s

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