chore(core-preferences): migrate build to tsdown

packages/@core/preferences/package.json

@@ -11,7 +11,7 @@
   "license": "MIT",
   "type": "module",
   "scripts": {
-    "build": "tsdown"
+    "build": "pnpm exec tsdown"
   },
   "files": [
     "dist",

packages/@core/preferences/tsdown.config.ts

@@ -5,4 +5,7 @@ export default defineConfig({
   dts: true,
   entry: ['src/index.ts'],
   format: ['esm'],
+  outExtensions: () => ({
+    dts: '.d.ts',
+  }),
 });