docs: audit English source + migrate i18n to zh-Hans and add ja/de/es/fr#9

os-zhuang merged 2 commits into

mainobjectstack-ai/objectos:mainfrom

docs/i18n-zh-hans-migration-and-auditobjectstack-ai/objectos:docs/i18n-zh-hans-migration-and-auditCopy head branch name to clipboard