refac(io) set IO once in main to allow overriding with in memory io i…#1363

cgoetz-inovex wants to merge 2 commits intomainstackitcloud/stackit-cli:mainfrom

feat/STACKITCLI-318_secret-flagsstackitcloud/stackit-cli:feat/STACKITCLI-318_secret-flagsCopy head branch name to clipboard