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/src/index.js

@@ -156,6 +156,7 @@ export default class Artplayer extends Emitter {
             autoPlayback: false,
             autoOrientation: false,
             airplay: false,
+            video: null,
             layers: [],
             contextmenu: [],
             controls: [],