fix(workflows): reject non-string/non-boolean 'condition' in if/while/do-while steps#3706

mnriem merged 3 commits into

github:maingithub/spec-kit:mainfrom

jawwad-ali:fix/conditional-steps-condition-type-guardjawwad-ali/spec-kit:fix/conditional-steps-condition-type-guardCopy head branch name to clipboard