完成新docs结构

docs/assets/example/backlight.js

@@ -0,0 +1,9 @@
+var art = new Artplayer({
+    container: '.artplayer-app',
+    url: 'https://zhw2590582.github.io/assets-cdn/video/ambilight.mp4',
+    autoSize: true,
+    moreVideoAttr: {
+        crossOrigin: 'anonymous',
+    },
+    plugins: [artplayerPluginBacklight],
+});