Add example (#187)

.changeset/flat-countries-rule.md

@@ -3,3 +3,59 @@
 ---
 
 Support extending non-root object types
+
+For example, given this schema:
+
+```graphql
+# user/schema.graphql
+type User {
+  id: ID!
+}
+
+#  car/schema.graphql
+extend type User {
+  cars: [Car!]!
+}
+
+# house/schema.graphql
+extend type User {
+  housesOwned: [House!]!
+  housesSold: [House!]!
+}
+```
+
+It'd generate these files:
+
+```ts
+// user/resolvers/User.ts
+export const User: Pick<UserResolvers, 'id'> = {
+  // ...
+};
+
+// car/resolvers/User.ts
+export const User: Pick<UserResolvers, 'cars'> = {
+  // ...
+};
+
+// house/resolvers/User.ts
+export const User: Pick<UserResolvers, 'housesOwned' | 'housesSold'> = {
+  // ...
+};
+```
+
+And the main resolver file:
+
+```ts
+// resolvers.generated.ts
+import { User as user_User } from './user/resolvers/User';
+import { User as car_User } from './car/resolvers/User';
+import { User as house_User } from './house/resolvers/User';
+
+export const resolvers: Resolvers = {
+  User: {
+    ...user_User,
+    ...car_User,
+    ...house_User,
+  },
+};
+```