[AI-72] LangGraph plugin samples #1115

Job	Run time
build-lint-test (3.14, windows-latest)	59s
build-lint-test (3.10, macos-intel)	1m 12s
build-lint-test (3.14, macos-intel)	1m 8s
build-lint-test (3.14, macos-arm)	1m 11s
build-lint-test (3.10, windows-latest)	57s
build-lint-test (3.14, ubuntu-latest)	49s
build-lint-test (3.10, ubuntu-latest)	1m 0s
build-lint-test (3.10, macos-arm)	1m 6s
	8m 22s

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