feat(i18n): add Arabic language support (#11161)

## Which Problems Are Solved

- Add comprehensive Arabic language support to ZITADEL

## How the Problems Are Solved

- Added full Arabic translation files for the login UI, console, and
notification (yaml and json).
- Ensured all keys match the latest English reference files to avoid
missing or inconsistent entries.
- Updated the localization loader to include `ar` as a supported
language.

## Additional Changes


## Additional Context


Closes #11146

---------

Co-authored-by: Marco A. <[email protected]>

console/src/assets/i18n/id.json

@@ -1555,7 +1555,8 @@
         "ko": "한국어",
         "ro": "Română",
         "tr": "Türkçe",
-        "uk": "Українська"
+        "uk": "Українська",
+        "ar": "العربية"
       }
     },
     "SMTP": {
@@ -1803,7 +1804,8 @@
         "ko": "한국어",
         "ro": "Română",
         "tr": "Türkçe",
-        "uk": "Українська"
+        "uk": "Українська",
+        "ar": "العربية"
       },
       "KEYS": {
         "emailVerificationDoneText": "Verifikasi email selesai",
@@ -2787,7 +2789,8 @@
     "ko": "한국어",
     "ro": "Română",
     "tr": "Türkçe",
-    "uk": "Українська"
+    "uk": "Українська",
+    "ar": "العربية"
   },
   "MEMBER": {
     "ADD": "Tambahkan Manajer",