refactor: Update video element in Artplayer to support custom canvas or video

This commit updates the `libmedia.js`, `option.d.ts`, `index.js`, `template.js`, and `scheme/index.js` files in the Artplayer repository. The changes introduce a new `video` property in the `Option` type, allowing for the use of a custom video element in Artplayer. The `video` property can be set to `null`, an `HTMLCanvasElement`, or an `HTMLVideoElement`. This enhancement provides flexibility in rendering video content and improves compatibility with different platforms and use cases.

packages/artplayer/types/option.d.ts

@@ -207,6 +207,11 @@ export type Option = {
      */
     airplay?: boolean;
 
+    /**
+     * Custom video element
+     */
+    video?: null | HTMLCanvasElement | HTMLVideoElement;
+
     /**
      * Custom plugin list
      */