Add support for amazon public container registry (docker)

URL: https://gallery.ecr.aws/
Packages count: 199,550

API URLs:
- https://api.us-east-1.gallery.ecr.aws/searchRepositoryCatalogData (post)
- https://api.us-east-1.gallery.ecr.aws/getRegistryCatalogData (post)
- https://api.us-east-1.gallery.ecr.aws/getRepositoryCatalogData (post)
- https://api.us-east-1.gallery.ecr.aws/describeImageTags (post)

Start by examining existing registry integrations and how they represent repository and image metadata. Use the listed Amazon ECR Public API endpoints for repository search, registry and repository catalog data, and image tags. Done means the service supports gallery.ecr.aws and exposes the reported package information through its API.

Written by the indexing model from the issue text.