mux:debug Artisan Command

Debug Mux configuration and setup.

Warn about missing credentials, misconfigured queue, disabled mirror feature, and missing asset containers with Mux Mirror fields.

# Check for Mux configuration issues
php artisan mux:debug

Example output:

✓ Mux is configured with credentials.
✓ The queue is configured to use a background worker.
✓ The mirror feature is globally enabled.
✗ No asset containers found with Mux Mirror fields.