feat(container): add registry list command and public link on container create

[fabienfleureau]

Summary

• Add qovery container registry list subcommand — lists all container registries for an organization with --organization and --json flags
• Add --json flag to qovery container create — JSON output includes id, name, and public_link (when a port is configured and a link is available after creation)
• Replace hand-rolled fmt.Sprintf JSON string in container create with encoding/json + anonymous struct to avoid escaping issues on names containing special characters

[Copilot]

Pull request overview

This PR adds two new features to the Qovery CLI: a qovery container registry list subcommand that lists all container registries for an organization, and a --json flag to qovery container create that outputs structured JSON including the service id, name, and optionally public_link after creation. It also replaces hand-rolled JSON strings with encoding/json marshalling in the create command.

Changes:

• Add qovery container registry list subcommand with --organization and --json flags for tabular and JSON output
• Add --json flag to qovery container create, outputting id, name, and public_link using encoding/json instead of manual string formatting
• Add qovery container registry parent command as the new subcommand group host

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
cmd/container_registry.go	New parent registry subcommand under container, following the same pattern as container_domain.go and container_env.go
cmd/container_registry_list.go	New list subcommand that fetches and displays container registries in tabular or JSON format
cmd/container_create.go	New create subcommand for container services with --json output including a public_link field

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