lang: add missing kabyle language

Fixing missing kabyle language in the main file.

lang/languages.json

@@ -25,6 +25,7 @@
     "id": "Indonesian",
     "it": "Italian",
     "ja": "Japanese",
+    "kab": "Kabyle",
     "ko": "Korean",
     "lt": "Lithuanian",
     "nl": "Dutch",