Add banner options from Rollup config

vite.config.js

@@ -1,5 +1,6 @@
 import { defineConfig } from "vite";
 import * as path from "path";
+import pkg from "./package.json";
 
 export default defineConfig({
   esbuild: {
@@ -14,5 +15,10 @@ export default defineConfig({
       name: "Shareon",
       formats: ["es", "umd", "iife"],
     },
+    rollupOptions: {
+      output: {
+        banner: `/*! ${pkg.name} v${pkg.version} */`,
+      },
+    },
   },
 });