fix: respect "use client" in final build

Author: izziaraffaele

package.json

@@ -63,25 +63,6 @@
     "tsup": "^7.2.0",
     "typescript": "^5.1.6"
   },
-  "tsup": {
-    "entry": [
-      "src/index.ts"
-    ],
-    "treeshake": true,
-    "sourcemap": "inline",
-    "minify": true,
-    "clean": true,
-    "dts": true,
-    "splitting": false,
-    "format": [
-      "cjs",
-      "esm"
-    ],
-    "external": [
-      "react"
-    ],
-    "injectStyle": false
-  },
   "engines": {
     "node": ">=14",
     "yarn": ">=1"

tsup.config.js

@@ -0,0 +1,19 @@
+import { defineConfig } from 'tsup';
+
+export default defineConfig({
+  entry: ['src/index.ts'],
+  treeshake: false,
+  sourcemap: 'inline',
+  minify: true,
+  clean: true,
+  dts: true,
+  splitting: false,
+  format: ['cjs', 'esm'],
+  external: ['react'],
+  injectStyle: false,
+  esbuildOptions: (options) => {
+    options.banner = {
+      js: '"use client"',
+    };
+  },
+});