feat(setting): implémenter la suppression d'une ContentSource

- Ajoute DeleteContentSourceCommand + CommandHandler (CQRS)
- Expose DELETE /api/content-sources/{id} via API Platform (Resource, Provider, Processor)
- Ajoute 2 tests Feature (204 succès, 404 not found)
- Frontend : méthode delete() dans le repository, action deleteSource() dans le store
- Nouveau composant ContentSourceDeleteModal (modale de confirmation)
- Bouton Supprimer dans la toolbar de ScrapperEdit (visible en mode édition uniquement)

assets/vue/app/domain/setting/application/store/contentSourceStore.js

@@ -28,6 +28,10 @@ export const useContentSourceStore = defineStore('contentSource', {
         // Health check state
         checkingHealth: false,
         checkHealthError: null,
+
+        // Delete state
+        deleting: false,
+        deleteError: null,
     }),
 
     getters: {
@@ -172,6 +176,28 @@ export const useContentSourceStore = defineStore('contentSource', {
             }
         },
 
+        // Delete a source
+        async deleteSource(id) {
+            if (this.deleting) return;
+
+            this.deleting = true;
+            this.deleteError = null;
+
+            try {
+                await contentSourceRepository.delete(id);
+                this.sources = this.sources.filter(source => source.id !== id);
+                if (this.currentSource && this.currentSource.id === id) {
+                    this.currentSource = null;
+                }
+            } catch (error) {
+                this.deleteError = error.message;
+                console.error('Erreur lors de la suppression de la source:', error);
+                throw error;
+            } finally {
+                this.deleting = false;
+            }
+        },
+
         // Clear current source
         clearCurrentSource() {
             this.currentSource = null;