chore(build): 优化依赖和配置文件管理

- .gitignore 中新增 .env 文件忽略规则并保留示例文件
- package.json 中新增 src 文件夹纳入发布文件范围
- 升级 devDependencies 中部分包版本并新增 AWS SDK 和 es-toolkit 等依赖
- 移除 lodash 改用 es-toolkit 的 omit 函数以减小包体积
- 使用 dotenv 的解构导入替换默认导入，规范配置加载方式
- util 模块导出新增 extract-standard-headers 功能模块接口

package.json

@@ -6,19 +6,22 @@
     "build": "bun run bun.config.ts"
   },
   "files": [
-    "dist"
+    "dist",
+    "src"
   ],
   "keywords": [],
   "author": "abearxiong <xiongxiao@xiongxiao.me>",
   "license": "MIT",
   "type": "module",
   "devDependencies": {
-    "@types/bun": "^1.3.3",
-    "@types/node": "^24.10.1",
+    "@types/bun": "^1.3.5",
+    "@types/node": "^25.0.3",
     "bun-plugin-dts": "^0.3.0",
-    "dotenv": "^16.5.0",
-    "minio": "^8.0.5",
-    "tsup": "^8.4.0"
+    "dotenv": "^17.2.3",
+    "minio": "^8.0.6",
+    "@aws-sdk/client-s3": "^3.0.0",
+    "es-toolkit": "^1.43.0",
+    "fast-glob": "^3.3.3"
   },
   "exports": {
     ".": {
@@ -37,9 +40,5 @@
   "publishConfig": {
     "access": "public"
   },
-  "dependencies": {
-    "@types/lodash": "^4.17.21",
-    "fast-glob": "^3.3.3",
-    "lodash": "^4.17.21"
-  }
+  "dependencies": {}
 }