feat: --background#146

raymondk merged 23 commits intomaindfinity/icp-cli:mainfrom

SDK-2373-icp-cli-can-launch-a-network-in-the-background-and-terminate-it-cleanlydfinity/icp-cli:SDK-2373-icp-cli-can-launch-a-network-in-the-background-and-terminate-it-cleanlyCopy head branch name to clipboard