Add Freebuff /model alias #6630

Job	Run time
build-and-check	3m 6s
test-integration-packages/internal	1m 12s
test-integration-common	40s
test-integration-cli	45s
test-integration-packages/agent-runtime	42s
test-integration-sdk	1m 13s
test-integration-web	39s
test-.agents	42s
test-common	39s
test-packages/agent-runtime	58s
test-packages/billing	57s
test-packages/internal	54s
test-cli	1m 37s
test-web	59s
test-integration-packages/billing	1m 4s
test-sdk	48s
	16m 55s

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