Componentize messages, error messages and progress indicator.

package.json

@@ -27,6 +27,7 @@
     "@babel/plugin-proposal-class-properties": "^7.14.5",
     "@babel/plugin-proposal-decorators": "^7.15.4",
     "@rollup/plugin-json": "^4.1.0",
+    "@rollup/plugin-multi-entry": "^4.1.0",
     "@typescript-eslint/eslint-plugin": "^4.30.0",
     "@typescript-eslint/parser": "^4.30.0",
     "eslint": "^7.32.0",