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/ca/rules.php

@@ -44,6 +44,11 @@ return [
         'too_many' => 'Com a molt :max files per importació.',
     ],
 
+    'tokens' => [
+        'ability' => '«:ability» no és un permís que tinguis, així que un token teu no el pot tenir.',
+        'machine' => 'Els tokens els gestiona una persona, no un altre token.',
+    ],
+
     'settings' => [
         'read_only' => 'Aquest ajust l\'escriu l\'aplicació i no es pot editar a mà.',
     ],