thrunt-update

<objective> Check for THRUNT updates, install if available, and display what changed.

Routes to the update workflow which handles:

• Version detection (local vs global installation)
• npm version checking
• Changelog fetching and display
• User confirmation with clean install warning
• Update execution and cache clearing
• Restart reminder</objective>

<execution_context> @.github/thrunt-god/workflows/update.md </execution_context> <process> **Follow the update workflow** from `@.github/thrunt-god/workflows/update.md`.

The workflow handles all logic including:

1. Installed version detection (local/global)
2. Latest version checking via npm
3. Version comparison
4. Changelog fetching and extraction
5. Clean install warning display
6. User confirmation
7. Update execution
8. Cache clearing</process>