feat: add basic profile support

[mhornbacher]

Summary

Basic support for AWS profiles as per #17

Example

steps:
  - commands: 'echo \$SECRET_FROM_OTHER_REGION'
    plugins:
      - seek-oss/aws-sm#v2.3.1:
          profile: profile-name
          env:
            SECRET_FROM_OTHER_PROFILE: my-secret-id

Limitations

This Pull Request does not support separate profiles per secret. Due to how env secrets are loaded this would require a much larger and therefore riskier refactor.

Closes #17

[mhornbacher]

@72636c this is a minor blocker for us. Would it be possible to get a review done by April 10?

[jmandel1027]

Whoops! I thought this was on our end

[mhornbacher]

Thanks for the vote of confidence :)

[mhornbacher]

Looks like nothing has happened here in two years