Convert cleanup-worktree.sh to TypeScript with port killing and verif… #5032

Job	Run time
build-and-check	2m 35s
test-integration-.agents	1m 9s
test-integration-common	40s
test-integration-backend	41s
test-integration-cli	39s
test-integration-npm-app	40s
test-integration-packages/agent-runtime	41s
test-integration-packages/internal	41s
test-integration-web	42s
test-integration-packages/billing	45s
test-integration-sdk	55s
test-backend	46s
test-npm-app	48s
test-.agents	41s
test-cli	1m 9s
test-packages/internal	43s
test-common	44s
test-sdk	44s
test-web	43s
test-packages/billing	38s
test-packages/agent-runtime	53s
	17m 57s

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