feat(scripts): add SPECIFY_FEATURE_NO_PERSIST env var to suppress feature.json writes (#4128) - #4129

feat(scripts): add SPECIFY_FEATURE_NO_PERSIST env var to suppress feature.json writes (#4128)#4129

mnriem merged 4 commits into

github:maingithub/spec-kit:mainfrom

chelsealong:fix/4128-specify-no-persistchelsealong/spec-kit:fix/4128-specify-no-persistCopy head branch name to clipboard