feat(i18n): add Tamil (ta-IN) translations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Meganathanrbm

config/i18n.ts

@@ -161,6 +161,11 @@ const locales: (LocaleObjectData | (Omit<LocaleObjectData, 'code'> & { code: str
     code: 'de-DE',
     file: 'de-DE.json',
     name: 'Deutsch',
+  },
+    {
+    code: 'ta-IN',
+    file: 'ta-IN.json',
+    name: 'தமிழ்',
   },
   {
     code: 'hi-IN',