refactor(asr): [PKG-ASR-04] preserve old declarations and add precise runtime types

packages/artplayer-plugin-asr/README.md

@@ -8,6 +8,35 @@ restart capture; the player's direct Web Audio connection remains alive until
 the player is destroyed so that stopping recognition does not silence playback.
 Call `art.destroy()` when disposing the player.
 
+## TypeScript
+
+Existing imports keep their historical types, including `stop(): void` and a
+`void | Promise<void>` recognition callback. For accurate asynchronous types, use
+the additive `/runtime` entry. It loads the same implementation as the root entry:
+
+```ts
+import Artplayer from 'artplayer'
+import asr from 'artplayer-plugin-asr/runtime'
+import type { RuntimeOption } from 'artplayer-plugin-asr/runtime'
+
+const option: RuntimeOption = {
+  onAudioChunk: async ({ pcm, wav }) => {
+    // Send one of these buffers to your own recognition service.
+    void [pcm, wav]
+    return 'Recognized text.'
+  },
+}
+const art = new Artplayer({ container: '#player', url: '/video.mp4' })
+const recognition = asr(option)(art)
+await recognition.stop()
+```
+
+The callback may return text, `null`, or no value, synchronously or asynchronously.
+CommonJS TypeScript can use `import asr = require('artplayer-plugin-asr/runtime')`.
+The root declaration retains its historical NodeNext ESM namespace shape; use
+`/runtime` for a directly callable default import in that mode. This is an opt-in
+type entry, and does not require changes to existing JavaScript consumers.
+
 ## Maintenance
 
 See [ARCHITECTURE.md](ARCHITECTURE.md) for the current audio flow, public behavior,