acecode

@m-sameer @nmanovic I think we should use an i18n component too. I'm a front-end coder, so I have an idea for the `cvat-ui` package We can inject the `i18n translate...

@KrishavRajSingh @nmanovic Here is a [Dirty Prototype](https://github.com/acecode/cvat/tree/hotfix/v2.12.2-i18next) maybe Only zh-cn and en locales [i18next on v2.12.1](https://github.com/acecode/cvat/compare/v2.12.1...hotfix/v2.12.2-i18next) * packages 1. `i18n-next` and some plugin on it * `i18next-browser-languagedetector` * `i18next-resources-to-backend` 2....