fix: add missing App\Support\I18n class

Was created but never staged in the previous commit; deployment failed
with 'Class App\Support\I18n not found' on any page that uses the
I18n::opts() wrapper on Model::CONSTANT Select options.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Support/I18n.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Support;
+
+class I18n
+{
+    /**
+     * Translate the string values of an options array (key stays as DB enum).
+     * Usage: ->options(I18n::opts(Model::STATUSES))
+     */
+    public static function opts(array $options): array
+    {
+        return array_map(fn ($v) => is_string($v) ? __($v) : $v, $options);
+    }
+}