devel/rubygem-aws-sdk-ssmincidents: Add rubygem-aws-sdk-ssmincidents 1.0.0

Official AWS Ruby gem for AWS Systems Manager Incident Manager (SSM Incidents).

WWW: https://github.com/aws/aws-sdk-ruby
WWW: https://github.com/aws/aws-sdk-ruby/tree/master/gems/aws-sdk-ssmincidents