PT_BR localization

@zupolgec and @sjeitiI translated it to Brazilian Portuguese using glotpress, but it’s showing this message: “This plugin is not properly prepared for localization (View detailed logs on Slack). If you would like to translate this plugin, please contact the author.”

Besides that, I would like to become a PTE, so I can make new translations easier and faster. The process is explained in here: https://make.ww.wp.xz.cn/polyglots/handbook/rosetta/theme-plugin-directories/#requesting-new-translation-editors

Thanks