feature: `lambroll deploy` can create Event Source Mapping with flag (like `--event-source-mapping`)

[kittyflute1812]

Hi, thanks for developing a useful deployment tool for lambda!

I create a Lambda event source mappings with aws cli after running lambroll deploy and creating a Lambda Function.
I think it would be useful to be able to create Event Source Mapping at the same time when executing lambroll deploy. (with flags like --event-source-mapping)

Thank you.

[fujiwara]

@kittyflute1812 I'm sorry for the slow response.

I thought about managing event source mappings by lambroll, but it is difficult for the reasons below.

Multiple event source mappings can be attached to a lambda function.

When we want to change configurations of some mappings, lambroll has to detect the ones that need to be updated or created only from passed CLI arguments. But it seems impossible because lambroll doesn't have state information (like a tfstate of Terraform).