chore: move typed-router.d.ts to src and update version to 20 (#516)

vite.config.ts

@@ -36,6 +36,7 @@ export default defineConfig({
     // https://github.com/posva/unplugin-vue-router
     VueRouter({
       extensions: ['.vue', '.md'],
+      dts: 'src/typed-router.d.ts',
     }),
 
     // https://github.com/JohnCampionJr/vite-plugin-vue-layouts