feat: Add excludedItems parameter to autocomplete function with dynam…

…ic size adjustment


**Description (optional):**  
- Added `excludedItems` parameter to filter out unwanted items from auto-suggestions.  
- Dynamically adjusted the `size` parameter to request additional items based on the length of the exclusion list.  
- Ensured safety by handling potential null values in `excludedItems`.  
- Improved overall flexibility of the autocomplete functionality.

lib/src/open_food_search_api_client.dart

@@ -33,6 +33,7 @@ class OpenFoodSearchAPIClient {
     final int size = 10,
     final Fuzziness fuzziness = Fuzziness.none,
     final UriProductHelper uriHelper = uriHelperFoodProd,
+    final List<String>? excludedItems,
   }) async {
     query = query.trim();
     if (query.isEmpty) {
@@ -52,7 +53,7 @@ class OpenFoodSearchAPIClient {
         'q': query,
         'taxonomy_names': taxonomyTags.join(','),
         'lang': language.offTag,
-        'size': size.toString(),
+        'size': (size + (excludedItems?.length ?? 0)).toString(),
         'fuzziness': fuzziness.offTag,
       },
     );
@@ -61,8 +62,19 @@ class OpenFoodSearchAPIClient {
       user: user,
       uriHelper: uriHelper,
     );
-    return AutocompleteSearchResult.fromJson(
+    // Parse the response
+    final AutocompleteSearchResult autocompleteSearchResult =
+        AutocompleteSearchResult.fromJson(
       HttpHelper().jsonDecode(utf8.decode(response.bodyBytes)),
     );
+    // If no exclusions are specified, return the result as-is
+    if (excludedItems == null || excludedItems.isEmpty) {
+      return autocompleteSearchResult;
+    }
+    // Filter out excluded items
+    autocompleteSearchResult.options?.removeWhere(
+      (option) => excludedItems.contains(option.text),
+    );
+    return autocompleteSearchResult;
   }
 }