feat: 添加bun-test项目并配置Rollup打包

新增bun-test项目，包含Rollup配置、lodash-es依赖及示例代码，同时更新pnpm-lock.yaml

bun-test/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "bun-test",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "packageManager": "pnpm@10.25.0",
+  "devDependencies": {
+    "@types/bun": "^1.3.4"
+  },
+  "dependencies": {
+    "@rollup/plugin-node-resolve": "^16.0.3",
+    "esbuild": "^0.27.2",
+    "lodash-es": "^4.17.22",
+    "rollup": "^4.54.0"
+  }
+}