Add support for local code artifacts

[gurdiga]

The example code in the Uploading Local Artifacts to an S3 Bucket doc says that the Code property of a AWS::Lambda::Function resource can be a string (pathname) for the purpose of using it with the aws cloudformation package command which then replaces it (in its output) with a proper Code value.

I’m not sure how to incorporate this new type option for Code, or if it’s the right way to approach it, so I’m just bringing it up for discussion here.

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NOTE: The docs are a bit outdated and there is a PR to fix them, but I have tested it with aws cloudformation package command and it seems to accept and properly handle the pathname as documented.

NOTE2: For now, I worked around this limitation with a “double type assertion”:

import {Code} from "cloudform-types/types/lambda/function";

/* ... */
const FunctionCode = new Lambda.Function({
  /* ... more props */
  Code: ("/Users/vlad/src/repetitor.tsx/src/cloud/aws/lambda/test-lambda/" as any) as Code
}