New guide Page: Typescript

[vaibhavsingh97]

• [ ] Should talk about
  • [ ] Manual (Quick one)
    • [ ] Installing typescript and ts-node
    • [ ] Configuring tsconfig.json (recommended config and location of the config)
      • [ ] Adding Note on Existing Nightwatch project can use typescript (Mostly Nightwatch CLI will display doc link if an existing user is using compiling Typescript to Javascript)
  • [ ] Alternative way (recommended for new projects)
    • [ ] Using create-nightwatch tool
    • [ ] Talk about create-nightwatch to scaffold config and example tests

Note: When the user navigated from Nightwatch CLI then, user should see steps very clearly

Related PR: https://github.com/nightwatchjs/nightwatch-docs/pull/130