Add clean & prepare scripts

package.json

@@ -26,7 +26,9 @@
     "app": "ts-node src/index.ts",
     "cli": "ts-node src/cli.ts",
     "watch": "nodemon --ext js,pug,ts --watch src --exec 'ts-node src/index.ts'",
-    "build": "rimraf lib && tsc -p tsconfig.json && fse copy --all --dereference --preserveTimestamps --keepExisting=false --quiet --errorOnExist=false src/app/resources lib/app/resources"
+    "clean": "rimraf lib",
+    "prepare": "pnpm run build",
+    "build": "pnpm run clean && tsc -p tsconfig.json && fse copy --all --dereference --preserveTimestamps --keepExisting=false --quiet --errorOnExist=false src/app/resources lib/app/resources"
   },
   "files": [
     "lib/**/*"