add: flatten collection.handle

packages/medusa-plugin-meilisearch/src/utils/transform-product.js

@@ -32,6 +32,7 @@ export const transformProduct = (product) => {
 
   product.type_value = product.type && product.type.value
   product.collection_title = product.collection && product.collection.title
+  product.collection_handle = product.collection && product.collection.handle
   product.tags_value = product.tags ? product.tags.map((t) => t.value) : []
 
   return {