feat: implement i18n with next-intl for Chinese Simplified and Traditional support#232

Copilot wants to merge 7 commits intomainrxtech-lab/rxchat-web:mainfrom

copilot/fix-f02fe453-bab3-43bd-bb65-f41fbaf2e7ecrxtech-lab/rxchat-web:copilot/fix-f02fe453-bab3-43bd-bb65-f41fbaf2e7ecCopy head branch name to clipboard