Refactor code structure for improved readability and maintainability

feat: add JASSUB type definitions and update common.js references

feat: add JASSUB plugin for advanced subtitle rendering in HTML5 video

- Implemented a new JASSUB class for handling subtitle rendering with options for video and canvas targets.
- Added support for both synchronous and asynchronous rendering modes.
- Integrated Web Worker for offloading rendering tasks, improving performance.
- Included methods for managing subtitle tracks, styles, and events.
- Added color space verification and handling to ensure accurate subtitle display.
- Implemented local font access for enhanced typography options in subtitles.
- Introduced a benchmarking feature to assess rendering performance.

refactor: update README and type definitions for artplayer-plugin-jassub

- Removed installation and usage instructions from README.md for clarity.
- Updated index.js to remove direct assignment of jassub instance to art.
- Enhanced type definitions in artplayer-plugin-jassub.d.ts to include detailed JassubOption and JassubInstance interfaces.

docs/assets/example/jassub.js

@@ -1,12 +1,28 @@
+// https://github.com/ThaUnknown/jassub
 // npm i artplayer-plugin-jassub
 // import artplayerPluginJassub from 'artplayer-plugin-jassub';
 
 var art = new Artplayer({
     container: '.artplayer-app',
-    url: '/assets/sample/video.mp4',
+    url: '/assets/jassub/FateGrandOrderBabylonia-OP1v2-NCBD1080.webm',
+    autoSize: true,
+    fullscreen: true,
+    fullscreenWeb: true,
     plugins: [
         artplayerPluginJassub({
-            //
+            subUrl: '/assets/jassub/FGOBD.ass',
+            workerUrl: '/assets/jassub/jassub-worker.js',
+            wasmUrl: '/assets/jassub/jassub-worker.wasm',
+            modernWasmUrl: '/assets/jassub/jassub-worker-modern.wasm',
+            availableFonts: {
+                'liberation sans': '/assets/jassub/default.woff2'
+            },
+            fonts: [
+                '/assets/jassub/fonts/Averia Sans Libre Light.ttf',
+                '/assets/jassub/fonts/Averia Serif Simple Light.ttf',
+                '/assets/jassub/fonts/Gramond.ttf'
+            ],
+            timeOffset: -0.041
         }),
     ],
 });