Arabic support (#7630)

* Add 'ar' language (Arabic)

* Add front-end support

src/backend/InvenTree/InvenTree/locales.py

@@ -15,6 +15,7 @@ Additionally, update the following files with the new locale code:
 from django.utils.translation import gettext_lazy as _
 
 LOCALES = [
+    ('ar', _('Arabic')),
     ('bg', _('Bulgarian')),
     ('cs', _('Czech')),
     ('da', _('Danish')),

src/frontend/.linguirc

@@ -1,5 +1,6 @@
 {
     "locales": [
+        "ar",
         "bg",
         "cs",
         "da",

src/frontend/src/contexts/LanguageContext.tsx

@@ -17,6 +17,7 @@ export const defaultLocale = 'en';
  */
 export const getSupportedLanguages = (): Record<string, string> => {
   return {
+    ar: t`Arabic`,
     bg: t`Bulgarian`,
     cs: t`Czech`,
     da: t`Danish`,

src/frontend/src/locales/ar/messages.d.ts

@@ -0,0 +1,4 @@
+import { Messages } from '@lingui/core';
+          declare const messages: Messages;
+          export { messages };
+