feat: add --json output, fix config crash, extract validation utils#21

flaggdavid-source wants to merge 2 commits intoApexOpsStudio:mainApexOpsStudio/ai-gitops-test-target:mainfrom

flaggdavid-source:fix/all-three-bountiesflaggdavid-source/ai-gitops-test-target:fix/all-three-bountiesCopy head branch name to clipboard