Adds main entry point to Node module

• Updates the name in preparation of publishing to npm. (Feel free to suggest a different name)
• (Does not modify package.json#version since this package has not been published yet.)
• Adds index.js that exports all quickstarts
  • We may want to export snippets too in the future.

Example usage

import {quickstart} from '@gsuite/samples'
const quickstart = quickstart.sheets_v4;

// TODO: Get `auth` object
console.log(quickstart.SCOPES);
quickstart.listMajors(auth);

I chose to put the quickstarts in a quickstart object so we can just do a for-loop through all quickstarts (since they have the same format).

Future Considerations

In the future, we may consider:

• exporting a consistent name for our quickstarts (i.e. execute/run).

  module.exports = {
    SCOPES,
    execute,
  };

  (In TypeScript, this would be conforming to an interface:)

  {
    SCOPES: string[],
    execute: () => string
  }

• Testing quickstarts since they are now exported.

• Modifying the quickstart to return values instead of console.loging values.

  • This will be a lot easier when we have async/await since we can add this return without modifying the quickstart that is embedded within developers.google.com