Add image caching for playlist items

Move current_image caching to plugins

Remove redundant check

Add test for plugin cache

Skip puppeteer on GH actions

app/Models/Plugin.php

@@ -17,6 +17,7 @@ class Plugin extends Model
         'data_payload' => 'json',
         'data_payload_updated_at' => 'datetime',
         'is_native' => 'boolean',
+        'current_image' => 'string',
     ];
 
     protected static function boot()