[rtk-query-codegen] Update `package.json` with the scripts in order to generate the `api.js` file

In the current package.json file

{
  "name": "@layer5/rtk-query-codegen",
  "version": "0.0.1",
  "description": "Codegen to create rtk-query api from openapi schema",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "bin": {
    "rtk-query-codegen": "./app.js"
  },
  "author": "",
  "dependencies": {
    "@reduxjs/toolkit": "^1.9.6",
    "@rtk-query/codegen-openapi": "^1.0.0",
    "commander": "^11.0.0",
    "prettier-plugin-organize-imports": "^3.2.3",
    "ts-node": "^10.9.1"
  }
}

There is no scripts in place to build the generated file. The README.md instructions state to install Typescript globally, and this is not needed as this is already installed locally within yarn workspace by using yarn install at the root level.

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