chore: add usage example

.changeset/popular-walls-add.md

@@ -6,6 +6,39 @@ feat: initialize nestjs-query-graphql package.
 
 🎉🎉🎉 This is the initial release of our nestjs-query-graphql data provider. https://tripss.github.io/nestjs-query 🎉🎉🎉
 
-Supported features: - filters ✅ - sorters ✅ - pagination ✅ - offset connections ✅ - subscriptions ✅
+Supported features:
 
-Not supported features: - relay connections ❌
+-   filters ✅
+-   sorters ✅
+-   offset pagination ✅
+-   offset connections ✅
+-   subscriptions ✅
+
+Usage example:
+
+```tsx
+import graphqlDataProvider, {
+    GraphQLClient,
+    liveProvider,
+} from "@refinedev/nestjs-query-graphql";
+
+import { createClient } from "graphql-ws";
+
+const API_URL = `https://api.nestjs-query.refine.dev/graphql`;
+
+const WS_URL = `wss://api.nestjs-query.refine.dev/graphql`;
+
+const client = new GraphQLClient(API_URL);
+
+const wsClient = createClient(WS_URL);
+
+export const dataProvider = graphqlDataProvider(client);
+
+export const liveProvider = liveProdiver(wsClient);
+
+export const App = () => (
+    <Refine dataProvider={dataProvider} liveProvider={liveProvider}>
+        //...
+    </Refine>
+);
+```