refactor(vtt-thumbnail): [PKG-VTT-THUMB-04] preserve legacy types and expose async runtime entry

packages/artplayer-plugin-vtt-thumbnail/tsconfig.json

@@ -1,5 +1,14 @@
 {
   "extends": "../../tsconfig.base.json",
-  "compilerOptions": { "allowJs": false },
-  "include": ["src/**/*.ts", "types/**/*.d.ts", "../../types/assets.d.ts", "../../test/types/vtt-thumbnail-runtime.ts"]
+  "compilerOptions": {
+    "allowJs": false
+  },
+  "include": [
+    "src/**/*.ts",
+    "types/**/*.d.ts",
+    "../../types/assets.d.ts",
+    "../../test/types/vtt-thumbnail-runtime.ts",
+    "types/**/*.d.mts",
+    "types/**/*.d.cts"
+  ]
 }