docs: better README for the example

example/README.md

@@ -1 +1,20 @@
-# solid-relay-example
+# Solid Relay Example
+
+This is a SolidStart project that uses Solid Relay, demonstrating various features:
+
+- Basic GraphQL/Relay features like queries, fragments, mutations, paginations, etc.
+- Suspense and Transitions integration
+- SSR support, including streaming of `@defer`red queries
+- Preloading support with Solid Router
+- Server side fetching with `"use server"` on the network layer
+
+## Running the example
+
+Due to a Relay compiler requirement, [Watchman](https://facebook.github.io/watchman/) should be installed to run the compiler in watch mode.
+
+```sh
+pnpm i
+pnpm dev
+```
+
+The command will launch the SolidStart dev server, the Relay compiler, and the example GraphQL API server.