Add create visualization CLI command

[ivpusic]

Exposing CLI create visualization

[cursor]

PR Summary

Medium Risk
Additive CLI surface area but introduces a new API call path and user-supplied JSON parsing that could fail at runtime if inputs or API expectations change.

Overview
Adds a new top-level visualization (alias viz) command to the CLI, initially supporting viz create to create a visualization attached to an existing saved query.

viz create introduces flags for --query-id, --name, --type, --description, and required --options JSON, calls the API client’s CreateVisualization, and prints either text output with the generated embed URL or a small JSON payload (id, url). The PR also bumps github.com/duneanalytics/duneapi-client-go to v0.4.6.

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