[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/main/menus/tray.ts

@@ -7,6 +7,7 @@ import {Menu, MenuItem, MenuItemConstructorOptions} from 'electron';
 import {CombinedConfig} from 'types/config';
 
 import WindowManager from 'main/windows/windowManager';
+import {localizeMessage} from 'main/i18nManager';
 
 export function createTemplate(config: CombinedConfig) {
     const teams = config.teams;
@@ -21,7 +22,7 @@ export function createTemplate(config: CombinedConfig) {
         }), {
             type: 'separator',
         }, {
-            label: process.platform === 'darwin' ? 'Preferences...' : 'Settings',
+            label: process.platform === 'darwin' ? localizeMessage('main.menus.tray.preferences', 'Preferences...') : localizeMessage('main.menus.tray.settings', 'Settings'),
             click: () => {
                 WindowManager.showSettingsWindow();
             },