[MM-14058] Add support for i18n (#2190)

* Add language files

* Add react-intl, mmjstool, setup for adding translations

* Translated main module

* Translations for renderer

* A few minor fixes

* More fixes

* Add CI, add missing menu translations, other cleanup

* Added setting to manually select the language of the app

* Force English for E2e

* Unit tests

* Fix mmjstool

* Move set language to before update menu

* PR feedback

src/types/config.ts

@@ -45,6 +45,7 @@ export type ConfigV3 = {
     alwaysMinimize?: boolean;
     alwaysClose?: boolean;
     logLevel?: string;
+    appLanguage?: string;
 }
 
 export type ConfigV2 = {