Add visualization management via CLI

[ivpusic]

Calling dune Go SDK to interact with visualizations.

[cursor]

PR Summary

Medium Risk
Adds new CLI flows that call visualization CRUD endpoints, including permanent deletes and update requests assembled from existing server state; mistakes could lead to unintended changes to user visualizations.

Overview
Adds visualization management commands beyond create: dune viz get, list --query-id, update (flag-driven patch that preserves unspecified fields by fetching current state), and delete (permanent).

Updates CLI help text to clarify when to use query run-sql vs saved queries for visualizations, and bumps github.com/duneanalytics/duneapi-client-go to v0.4.7 to support the new visualization API calls.

^{Reviewed by Cursor Bugbot for commit d0f4ace. Configure here.}