feat: add plugins management (#3909)

examples/react-native-video-plugin-sample/src/index.tsx

@@ -0,0 +1,22 @@
+import { NativeModules, Platform } from 'react-native';
+
+const LINKING_ERROR =
+  `The package 'react-native-video-plugin-sample' doesn't seem to be linked. Make sure: \n\n` +
+  Platform.select({ ios: "- You have run 'pod install'\n", default: '' }) +
+  '- You rebuilt the app after installing the package\n' +
+  '- You are not using Expo Go\n';
+
+const VideoPluginSample = NativeModules.VideoPluginSample
+  ? NativeModules.VideoPluginSample
+  : new Proxy(
+      {},
+      {
+        get() {
+          throw new Error(LINKING_ERROR);
+        },
+      }
+    );
+
+export function multiply(a: number, b: number): Promise<number> {
+  return VideoPluginSample.multiply(a, b);
+}