feat: [dotnet] add agents app tests #4651

Job	Run time
check-proto-changes-python	1m 12s
docs (./packages/autogen-core)	1m 53s
docs-example-check (./packages/autogen-core)	3m 22s
format	1m 6s
lint	56s
markdown-code-lint	3m 20s
mypy (./packages/autogen-core)	3m 56s
pyright (./packages/autogen-core)	1m 0s
mypy (./packages/agbench)	1m 0s
samples-code-check	1m 0s
pyright (./packages/agbench)	59s
mypy (./packages/autogen-ext)	3m 8s
pyright (./packages/autogen-ext)	1m 19s
mypy (./packages/autogen-agentchat)	1m 40s
test (./packages/autogen-core)	1m 5s
pyright (./packages/autogen-agentchat)	1m 1s
mypy (./packages/magentic-one-cli)	1m 27s
test-grpc	6h 0m 14s
pyright (./packages/magentic-one-cli)	1m 8s
test (./packages/autogen-ext)	3m 53s
test (./packages/autogen-agentchat)	1m 6s
codecov (./packages/autogen-core)	8s
codecov (./packages/autogen-ext)	9s
codecov (./packages/autogen-agentchat)	8s
codecov (autogen-ext-grpc)	9s
	6h 36m 19s

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