feat(cli): add implicit command support for slashless invocation #5433

Job	Run time
build-and-check	2m 41s
test-integration-common	46s
test-integration-packages/internal	50s
test-cli	1m 8s
test-integration-.agents	48s
test-common	41s
test-integration-packages/billing	43s
test-integration-web	47s
test-integration-sdk	47s
test-integration-packages/agent-runtime	40s
test-packages/billing	40s
test-packages/agent-runtime	54s
test-sdk	42s
test-integration-cli	44s
test-.agents	38s
test-packages/internal	49s
test-web	42s
	15m 0s

Provide feedback