feat(MQTTPublisher): Mise à jour liste topics WLED

- Correction format topics (suppression slash initial)

- Ajout topics spécifiques couleur (wled/all/col, wled/panel/col)

VApp/src/components/MQTTColorPublisher.vue

@@ -53,12 +53,12 @@ import { publishMessage } from '@/services/mqttService';
 const selectedTopic = ref('Selectionnez un topic');
 const selectedColor = ref('#FF0000');
 const topics = ref([
-  '/wled/all',
+  'wled/all/col',
-  '/wled/1',
+  'wled/panel/col',
-  '/wled/2',
+  'wled/2',
-  '/wled/3',
+  'wled/3',
-  '/wled/4',
+  'wled/4',
-  '/wled/5',
+  'wled/5',
 ]);
 
 const publishCustomColor = () => {