feat: introduce snackbars for GQL errors

packages/web/src/graphql/client.ts

@@ -1,10 +1,23 @@
 import { ApolloClient } from '@apollo/client';
 import cache from './cache';
+import createLink from './link';
 import appConfig from 'config/app';
 
+type CreateClientOptions = {
+  onError?: (message: string) => void;
+};
+
 const client = new ApolloClient({
-  uri: appConfig.graphqlUrl,
-  cache
+  cache,
+  link: createLink({ uri: appConfig.graphqlUrl })
 });
 
+export function setLink({ onError }: CreateClientOptions) {
+  const link = createLink({ uri: appConfig.graphqlUrl, onError });
+
+  client.setLink(link);
+
+  return client;
+};
+
 export default client;