feat: azurelocal-troubleshooting-hunter — diagnostic and investigation tool

## Summary

Planned repo: \zurelocal-troubleshooting-hunter\

A diagnostic and investigation tool for Azure Local environments — helps identify and trace issues across the stack.

## Status

Placeholder — repo not yet created. Idea captured for future planning.

## Related
- Brainstorm: https://github.com/AzureLocal/azurelocal.github.io/issues/5