Create a typescript lambda example that deploys lambda from an external module

[colin-williams]

It would be nice if we could have a typescript example that creates the lambda logic in a separate node project, and then imports it as suggested in approach 2: https://www.pulumi.com/blog/easy-serverless-apps-and-infrastructure-real-events-real-code/#approach2-manual-function-resources .

Documentation suggests this might create the most robust lambdas, and obviate issues using magic functions.