message: protobuf-demo: Add scripts to pack proto definitions
diff: "test-chrome": "yarn pack-web && karma start --single-run --browsers ChromeHeadless",
  "test": "yarn build-or-skip && yarn test-node",
  "pack-web": "yarn build-or-skip && webpack --mode development --config webpack.web.config.js",
  - "get-proto": "./scripts/get-proto.sh"
  + "get-proto": "./scripts/get-proto.sh",
  + "prepack-proto": "mkdir -p src/generated",
  + "pack-proto": "pbjs -t static-module -w commonjs -o src/generated/codecimpl.js ./proto/**/*.proto",
  + "define-proto": "pbts src/generated/codecimpl.js -o src/generated/codecimpl.d.ts"
  },
  "devDependencies": {
  "protobufjs": "^6.9.0"
  