Build Plugin: Add plugin to download model files needed

[adam-fowler]

Add command plugin to download the AWS model files and endpoints.json required to build package instead of expecting user to go find them.

[Arpit160399]

Hi Adam,
I'm interested in developing this plugin. Could I start by tackling this as a first-time issue?

[adam-fowler]

Yes that'd be great. I must say I can't remember offhand how I expected this to work though.

[Arpit160399]

by the way Adam, I have a few questions regarding the project.
Firstly, the package configuration currently uses Swift version 5.6. However, network requests in the plugin were enabled in Swift version 5.9. Should we change the version or add a new package for Swift version 5.9?

Secondly, I was thinking of locating the services used from the Soto.config.json file for models to download is that alright?

[adam-fowler]

Soto supports the last three released versions of Swift. Unfortunately for you that includes 5.8. You could use a @available in code to gate access to this feature.

Yes use the Soto.config.json as the definition of what needs to be downloaded.