feat(users): govern profiles and access

Normalize fixed profile fields, profile actions, and the five-column capability matrix for comments, uploads, and downloads.

src/Settings/HomeCms.php

@@ -137,9 +137,7 @@ class HomeCms {
     public static function get_cms_features(): array {
         $defaults = [
             'resource_cpt_enabled'    => true,
-            'download_login'          => true,
             'download_credit'         => true,
-            'download_captcha'        => false,
             'search_include_resource' => true,
         ];
         $s = Settings::get_all();