Add .claude/settings.json with auto permission mode #6137

Job	Run time
build-and-check	3m 6s
test-integration-packages/billing	59s
test-integration-packages/internal	1m 2s
test-integration-web	44s
test-integration-cli	47s
test-integration-common	43s
test-integration-packages/agent-runtime	45s
test-integration-sdk	1m 17s
test-common	41s
test-packages/internal	55s
test-cli	1m 1s
test-.agents	50s
test-web	1m 36s
test-packages/billing	39s
test-sdk	47s
test-packages/agent-runtime	47s
	16m 39s

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