refactor(jassub): [PKG-JASSUB-04] migrate owned TypeScript and preserve public types

packages/artplayer-plugin-jassub/src/index.ts

@@ -0,0 +1,7 @@
+import type { RuntimeOption } from '../types/runtime-api.js'
+import type { JassubHost } from './registration.js'
+import { registerJassub } from './registration.js'
+
+export default function artplayerPluginJassub(option?: RuntimeOption) {
+  return (art: JassubHost) => registerJassub(art, option)
+}