draft: Add OpenFoodFacts Dataset

/!\ Warning: Stream doesn't end

src/services/data/OpenFoodFactsData.ts

@@ -0,0 +1,18 @@
+import { Data } from "./";
+
+type RawOpenFoodFactsData = {
+  code: string;
+  countries_en: string;
+};
+
+class OpenFoodFactsData implements Data {
+  input: string[] = [];
+  output: string[] = [];
+
+  constructor({ code, countries_en }: RawOpenFoodFactsData) {
+    this.input = [code];
+    this.output = [countries_en];
+  }
+}
+
+export default OpenFoodFactsData;