Add to_display to BaseMessage #4762

Job	Run time
docs (./packages/autogen-core)	1m 41s
check-proto-changes-python	1m 14s
docs-example-check (./packages/autogen-core)	3m 17s
format	50s
lint	52s
markdown-code-lint	2m 33s
mypy (./packages/autogen-core)	3m 46s
pyright (./packages/autogen-core)	1m 1s
mypy (./packages/agbench)	1m 9s
pyright (./packages/agbench)	56s
mypy (./packages/autogen-ext)	3m 5s
pyright (./packages/autogen-ext)	1m 5s
mypy (./packages/autogen-agentchat)	1m 25s
pyright (./packages/autogen-agentchat)	1m 0s
samples-code-check	1m 3s
mypy (./packages/magentic-one-cli)	1m 37s
pyright (./packages/magentic-one-cli)	55s
test (./packages/autogen-core)	1m 18s
test-grpc	1m 34s
test (./packages/autogen-ext)	4m 5s
test (./packages/autogen-agentchat)	1m 6s
codecov (./packages/autogen-core)	13s
codecov (./packages/autogen-ext)	9s
codecov (./packages/autogen-agentchat)	13s
codecov (autogen-ext-grpc)	13s
	36m 20s

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