chore(scripts): add clean:nm to root package.json (#5616)

feat(scripts): add clean:nm to root package.json

package.json

@@ -9,6 +9,7 @@
   ],
   "scripts": {
     "clean": "rm -rf ./packages/*/lib ./packages/*/*.tsbuildinfo",
+    "clean:nm": "rm -rf ./packages/*/node_modules ./node_modules",
     "build": "lerna run build",
     "build:docs": "lerna run build:refdocs && ./scripts/prepare-docs.sh",
     "build:watch": "lerna exec --parallel -- 'yarn run build:watch'",