docs: add features page

Summary: Adding a "features" page to the to bar and splitting plugin descriptions from their setup instructions.

Reviewed By: jknoxville

Differential Revision: D15147464

fbshipit-source-id: b2106d825454c3b2989eb1e536b128ef9b6d0247

docs/setup/network-plugin.md

@@ -0,0 +1,38 @@
+---
+id: network-plugin
+title: Network Setup
+sidebar_label: Network
+---
+
+To use the network plugin, you need to add the plugin to your Flipper client instance.
+
+## Android
+
+```java
+import com.facebook.flipper.plugins.network.NetworkFlipperPlugin;
+
+NetworkFlipperPlugin networkFlipperPlugin = new NetworkFlipperPlugin();
+client.addPlugin(networkFlipperPlugin);
+```
+
+### OkHttp Integration
+
+If you are using the popular OkHttp library, you can use the Interceptors system to automatically hook into your existing stack.
+
+```java
+import com.facebook.flipper.plugins.network.FlipperOkhttpInterceptor;
+
+new OkHttpClient.Builder()
+    .addNetworkInterceptor(new FlipperOkhttpInterceptor(networkFlipperPlugin))
+    .build();
+```
+
+As interceptors can modify the request and response, add the Flipper interceptor after all others to get an accurate view of the network traffic.
+
+## iOS
+
+```objective-c
+#import <FlipperKitNetworkPlugin/FlipperKitNetworkPlugin.h>
+
+[client addPlugin: [FlipperKitNetworkPlugin new]]
+```