fix: silence unhandled play() rejections from internal callers

`art.play()` is an async wrapper around the native `video.play()` promise, which
rejects when a pending play request is interrupted (`pause()`, `load()`, a new
`src`, or the element being removed) and when autoplay is blocked.

Every internal caller fires it from an event handler and cannot await it, so the
rejection escapes as a global `unhandledrejection`. Error trackers report it as
an uncaught crash even though the player recovers on its own — for example
destroying the player right after mount, which is routine when the video sits in
a modal the user can close quickly.

Add a `silencePromise` util (the same approach video.js uses) and apply it to the
non-awaited internal call sites: mask, play control, mini player, loop restart,
autoPlayback jump, hotkey and click toggles.

`switchMix` is fixed too, for a second symptom: `await art.play()` inside the
async `video:canplay` handler both leaked the rejection and left the `switchUrl`
promise pending forever, since the throw never reached the enclosing executor's
`reject`. It now settles.

The public API is unchanged: `art.play()` and `art.toggle()` still return the
original promise, so applications that call them keep their own rejection to
handle. Only the internal, non-awaited copy is silenced.

packages/artplayer/src/plugins/autoPlayback.js

@@ -1,4 +1,4 @@
-import { append, query, secondToTime, setStyle } from '../utils'
+import { append, query, secondToTime, setStyle, silencePromise } from '../utils'
 
 export default function autoPlayback(art) {
   const {
@@ -57,7 +57,7 @@ export default function autoPlayback(art) {
 
       proxy($jump, 'click', () => {
         art.seek = currentTime
-        art.play()
+        silencePromise(art.play())
         setStyle($poster, 'display', 'none')
         setStyle($autoPlayback, 'display', 'none')
       })