feat: add breadcrumb in admin area

- add Breadcrumb library and service
- update authorizations
- add missing routes to avoid 404 links in breadcrumb
- add svg_helper globally in base controller
- update purgecss config to check .ts files

closes #17

app/Models/UserModel.php

@@ -17,8 +17,11 @@ class UserModel extends \Myth\Auth\Models\UserModel
 
     public function getPodcastContributor($user_id, $podcast_id)
     {
-        return $this->select('users.*')
+        return $this->select(
+            'users.*, users_podcasts.podcast_id as podcast_id, auth_groups.name as podcast_role'
+        )
             ->join('users_podcasts', 'users_podcasts.user_id = users.id')
+            ->join('auth_groups', 'auth_groups.id = users_podcasts.group_id')
             ->where([
                 'users.id' => $user_id,
                 'podcast_id' => $podcast_id,