feat: Introduce new integrations API and convert anthropic #261

Job	Run time
adk-py / test	15s
langchain-py (3.12, windows-latest) / test	1m 14s
build (3.10, ubuntu-latest, 1)	16s
langchain-py (3.10, ubuntu-latest) / test	26s
langchain-py (3.13, ubuntu-latest) / test	22s
langchain-py (3.11, windows-latest) / test	54s
build (3.11, ubuntu-latest, 0)	15s
build (3.11, windows-latest, 1)	1m 10s
build (3.11, windows-latest, 0)	51s
build (3.10, ubuntu-latest, 0)	21s
build (3.12, ubuntu-latest, 1)	16s
build (3.10, windows-latest, 1)	1m 3s
build (3.11, ubuntu-latest, 1)	18s
build (3.13, ubuntu-latest, 0)	16s
langchain-py (3.10, windows-latest) / test	57s
build (3.12, windows-latest, 0)	55s
build (3.12, ubuntu-latest, 0)	22s
build (3.10, windows-latest, 0)	51s
langchain-py (3.12, ubuntu-latest) / test	21s
build (3.12, windows-latest, 1)	1m 3s
build (3.13, windows-latest, 0)	1m 16s
langchain-py (3.13, windows-latest) / test	52s
langchain-py (3.11, ubuntu-latest) / test	21s
build (3.13, ubuntu-latest, 1)	16s
build (3.14, windows-latest, 0)	1m 11s
build (3.14, ubuntu-latest, 1)	19s
build (3.14, windows-latest, 1)	1m 8s
build (3.14, ubuntu-latest, 0)	15s
build (3.13, windows-latest, 1)	1m 2s
upload-wheel	0s
	19m 6s

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