feat: add artplayer-plugin-jassub with initial implementation and documentation

packages/artplayer-plugin-jassub/types/artplayer-plugin-jassub.d.ts

@@ -0,0 +1,13 @@
+import type Artplayer from 'artplayer';
+
+interface Option {
+    //
+}
+
+interface Result {
+    name: 'artplayerPluginJassub';
+}
+
+declare const artplayerPluginJassub: (option: Option) => (art: Artplayer) => Result;
+
+export default artplayerPluginJassub