build(package): 重构项目并添加 Rollup 构建配置

- 修改 package.json 中的 exports 字段，支持 CommonJS 和 ES 模块
- 添加 build 脚本，使用 Rollup 进行构建
- 新增 devDependencies，包含 Babel 和 Rollup 相关插件

package.json

@@ -6,23 +6,32 @@
   "type": "module",
   "exports": {
     ".": {
-      "import": "./index.js",
-      "require": "./index.js"
+      "require": "./dist/index.cjs",
+      "import": "./dist/index.mjs"
     }
   },
   "types": "types/index.d.ts",
   "scripts": {
-    "dev": "node index.js"
+    "dev": "node index.js",
+    "build": "rollup -c"
   },
   "repository": {
     "type": "git",
     "url": "https://git.ddmt.top/ddmt/ddmt-tool.git"
-    },
+  },
   "keywords": [
     "ddmt",
     "tool",
     "animate"
   ],
   "author": "ddmt",
-  "license": "MIT"
+  "license": "MIT",
+  "devDependencies": {
+    "@babel/core": "^7.26.9",
+    "@babel/preset-env": "^7.26.9",
+    "@rollup/plugin-babel": "^6.0.4",
+    "@rollup/plugin-commonjs": "^28.0.2",
+    "@rollup/plugin-node-resolve": "^16.0.0",
+    "rollup": "^4.34.8"
+  }
 }