Feature: Ability to rename projects

[scion-gteam]

Summary

Add the ability to rename an existing project (formerly grove) through both the CLI and web UI.

Problem

Currently there is no way to rename a project after creation. If a user creates a project with a wrong or outdated name, they must either live with it or recreate the project from scratch, losing configuration, agent history, and associations.

Proposed Behavior

CLI

scion project rename <old-name> <new-name>

Web UI

• Editable project name field in project settings

Considerations

• Slug update: The project slug should be regenerated from the new name, or optionally allow specifying a new slug separately
• References: Agents, templates, and other resources reference projects by ID (not name), so renaming should be safe for internal references
• Hub sync: The rename needs to propagate through the Hub API to all connected brokers
• Git branch naming: If project names are used in any branch naming conventions, those references may need updating
• Audit trail: The rename should be logged for traceability
• Uniqueness: Validate that the new name doesn't conflict with an existing project

Acceptance Criteria

• Projects can be renamed via CLI (scion project rename)
• Projects can be renamed via web UI (project settings)
• Rename propagates through Hub to all brokers
• Existing agents and templates continue to work after rename (ID-based references)
• Rename is reflected in all UI surfaces (web, CLI list/status)
• Duplicate name validation