Add missing API doc for Python code execution tool #3017

Job	Run time
codecov (./packages/autogen-core)	59s
format	50s
codecov (./packages/autogen-magentic-one)	1m 55s
lint	49s
codecov (./packages/autogen-ext)	2m 38s
mypy (./packages/autogen-core)	2m 23s
codecov (./packages/autogen-agentchat)	1m 4s
mypy (./packages/autogen-magentic-one)	1m 12s
pyright (./packages/autogen-core)	1m 6s
mypy (./packages/agbench)	53s
pyright (./packages/autogen-magentic-one)	1m 9s
mypy (./packages/autogen-ext)	1m 46s
mypy (./packages/autogen-agentchat)	1m 5s
pyright (./packages/agbench)	1m 40s
pyright (./packages/autogen-ext)	59s
pyright (./packages/autogen-agentchat)	55s
check-proto-changes-python	1m 9s
docs (./packages/autogen-core)	1m 26s
markdown-code-lint	6m 53s
docs-example-check (./packages/autogen-core)	2m 28s
test (./packages/autogen-core)	6m 17s
test (./packages/autogen-magentic-one)	1m 27s
test (./packages/autogen-ext)	2m 50s
test (./packages/autogen-agentchat)	1m 12s
	45m 5s

Provide feedback