fix: track Filament vendor translation files in git

The vendor/ entry in .gitignore was blocking lang/vendor/filament/
from being tracked. Added !lang/vendor/ exception and committed all
21 language translation files (login.php + resources.php) so the
other VPS can pull them via git.

lang/vendor/filament/it/login.php

@@ -0,0 +1,15 @@
+<?php
+
+return [
+'fields' => [
+    'username' => [
+            'label' => 'Username',
+    ],
+    'password' => [
+            'label' => 'Password',
+    ],
+    'remember' => [
+            'label' => 'Remember me',
+    ],
+],
+];