message: packages/core: fix watch mode
diff: "main": "dist/cjs/index.js",
  "types": "dist/cjs/index.d.ts",
  "scripts": {
  + "build:watch": "tsc --outDir dist/cjs --noEmit false --module CommonJS --watch",
  "build": "backstage-cli build-cache -- tsc --outDir dist/cjs --noEmit false --module CommonJS",
  "lint": "backstage-cli lint",
  "test": "backstage-cli test"
  