Merge pull request #7777 from altqx/libbitsub

Replace libpgs with libbitsub and adds support for vobsub rendering

package.json

@@ -117,7 +117,7 @@
     "jquery": "3.7.1",
     "jstree": "3.3.17",
     "libarchive.js": "2.0.2",
-    "libpgs": "0.8.1",
+    "libbitsub": "1.10.2",
     "lodash-es": "4.18.1",
     "markdown-it": "14.3.0",
     "material-design-icons-iconfont": "6.7.0",