chore: add unused dep checker

Author: sxzz

Diff for: package.json

@@ -113,6 +113,7 @@
     "source-map-js": "^1.2.0",
     "tsup": "^8.2.4",
     "typescript": "^5.5.4",
+    "unplugin-unused": "^0.1.4",
     "vitest": "2.0.5",
     "webpack": "^5.94.0"
   },

Diff for: pnpm-lock.yaml

@@ -1,4 +1,5 @@
 import { defineConfig } from 'tsup'
+import Unused from 'unplugin-unused/esbuild'
 
 export default defineConfig({
   entry: ['./src/*.ts'],
@@ -9,4 +10,5 @@ export default defineConfig({
   splitting: true,
   cjsInterop: true,
   shims: true,
+  esbuildPlugins: [Unused()],
 })