Adding arabic language

src-ui/angular.json

@@ -16,6 +16,7 @@
       "i18n": {
         "sourceLocale": "en-US",
         "locales": {
+          "ar-AR": "src/locale/messages.ar_AR.xlf",
           "be-BY": "src/locale/messages.be_BY.xlf",
           "cs-CZ": "src/locale/messages.cs_CZ.xlf",
           "da-DK": "src/locale/messages.da_DK.xlf",

src-ui/src/app/app.module.ts

@@ -80,6 +80,7 @@ import { TourNgBootstrapModule } from 'ngx-ui-tour-ng-bootstrap'
 import { MailAccountEditDialogComponent } from './components/common/edit-dialog/mail-account-edit-dialog/mail-account-edit-dialog.component'
 import { MailRuleEditDialogComponent } from './components/common/edit-dialog/mail-rule-edit-dialog/mail-rule-edit-dialog.component'
 
+import localeAr from '@angular/common/locales/ar'
 import localeBe from '@angular/common/locales/be'
 import localeCs from '@angular/common/locales/cs'
 import localeDa from '@angular/common/locales/da'
@@ -100,6 +101,7 @@ import localeSv from '@angular/common/locales/sv'
 import localeTr from '@angular/common/locales/tr'
 import localeZh from '@angular/common/locales/zh'
 
+registerLocaleData(localeAr)
 registerLocaleData(localeBe)
 registerLocaleData(localeCs)
 registerLocaleData(localeDa)

src-ui/src/app/services/settings.service.ts

@@ -146,6 +146,12 @@ export class SettingsService {
         englishName: 'English (US)',
         dateInputFormat: 'mm/dd/yyyy',
       },
+      {
+        code: 'ar-ar',
+        name: $localize`Arabic`,
+        englishName: 'Arabic',
+        dateInputFormat: 'yyyy-mm-dd',
+      },
       {
         code: 'be-by',
         name: $localize`Belarusian`,