chore: add type definition into dist

Author: Teages

package.json

@@ -8,10 +8,14 @@
   "repository": "nuxt-contrib/vue-sfc-transformer",
   "sideEffects": false,
   "exports": {
-    ".": "./dist/index.mjs"
+    ".": {
+      "types": "./dist/index.d.mts",
+      "import": "./dist/index.mjs"
+    }
   },
   "main": "./dist/index.mjs",
   "module": "./dist/index.mjs",
+  "types": "./dist/index.d.mts",
   "typesVersions": {
     "*": {
       "*": [