Add /model aliases for mode commands #6628

Job	Run time
build-and-check	2m 52s
test-integration-packages/internal	1m 1s
test-integration-packages/billing	1m 1s
test-integration-sdk	1m 19s
test-integration-common	39s
test-integration-cli	42s
test-integration-web	48s
test-integration-packages/agent-runtime	47s
test-cli	1m 1s
test-packages/agent-runtime	47s
test-web	1m 2s
test-packages/internal	49s
test-common	39s
test-packages/billing	40s
test-sdk	42s
test-.agents	44s
	15m 33s

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