Issue machine tokens with limited permissions and an expiry

A token acts as the person who made it, within the permissions it was given
and those they still hold, checked on every request. Permission checks now go
through one gate rule, since spatie's answered first and never asked the
token.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/es/rules.php

@@ -44,6 +44,11 @@ return [
         'too_many' => 'Como mucho :max filas por importación.',
     ],
 
+    'tokens' => [
+        'ability' => '«:ability» no es un permiso que tengas, así que un token tuyo no puede tenerlo.',
+        'machine' => 'Los tokens los gestiona una persona, no otro token.',
+    ],
+
     'settings' => [
         'read_only' => 'Este ajuste lo escribe la aplicación y no se puede editar a mano.',
     ],