Integrate i18n framework, translate welcome message as an example

Author: feifei325

package-lock.json

@@ -299,6 +299,7 @@
 		"pretty-bytes": "^6.1.1",
 		"puppeteer-chromium-resolver": "^23.0.0",
 		"puppeteer-core": "^23.4.0",
+		"react-i18next": "^15.4.1",
 		"serialize-error": "^11.0.3",
 		"simple-git": "^3.27.0",
 		"sound-play": "^1.1.0",