feat: switch to tsdown

package.json

@@ -2,7 +2,7 @@
   "name": "pkg-placeholder",
   "type": "module",
   "version": "0.0.0",
-  "packageManager": "pnpm@10.6.2",
+  "packageManager": "pnpm@10.17.1",
   "description": "_description_",
   "author": "Anthony Fu <anthonyfu117@hotmail.com>",
   "license": "MIT",
@@ -16,18 +16,18 @@
   "keywords": [],
   "sideEffects": false,
   "exports": {
-    ".": "./dist/index.mjs",
+    ".": "./dist/index.js",
     "./package.json": "./package.json"
   },
-  "main": "./dist/index.mjs",
-  "module": "./dist/index.mjs",
-  "types": "./dist/index.d.mts",
+  "main": "./dist/index.js",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "files": [
     "dist"
   ],
   "scripts": {
-    "build": "unbuild",
-    "dev": "unbuild --stub",
+    "build": "tsdown",
+    "dev": "tsdown watch",
     "lint": "eslint",
     "prepublishOnly": "nr build",
     "release": "bumpp",
@@ -45,10 +45,10 @@
     "eslint": "catalog:cli",
     "lint-staged": "catalog:cli",
     "simple-git-hooks": "catalog:cli",
-    "tinyexec": "catalog:utils",
+    "tinyexec": "catalog:testing",
+    "tsdown": "catalog:cli",
     "tsx": "catalog:cli",
     "typescript": "catalog:cli",
-    "unbuild": "catalog:cli",
     "vite": "catalog:cli",
     "vitest": "catalog:testing",
     "vitest-package-exports": "catalog:testing",