Added script command for running generator using yarn

Author: mbcse

package.json

@@ -11,7 +11,8 @@
     "lint": "lerna run lint",
     "prettier": "lerna run prettier",
     "format": "prettier --write",
-    "doc": "jsdoc -c jsdoc.json"
+    "doc": "jsdoc -c jsdoc.json",
+    "generator": " cd generator && tsc main.ts && node main.js"
   },
   "repository": {
     "type": "git",