Move tmux-cli to agents directory #5899

Job	Run time
build-and-check	3m 7s
test-integration-packages/internal	1m 4s
test-integration-packages/billing	2m 0s
test-integration-web	42s
test-integration-common	42s
test-packages/internal	47s
test-integration-sdk	1m 22s
test-.agents	45s
test-packages/billing	48s
test-web	50s
test-integration-cli	42s
test-sdk	49s
test-common	42s
test-integration-packages/agent-runtime	46s
test-cli	58s
test-packages/agent-runtime	47s
	16m 51s

Provide feedback