Print copyable scenario, config, and script templates

Usage: ax-eval template [OPTIONS] <KIND>

Arguments:
  <KIND>
          Template to print

          Possible values:
          - scenario:    Scenario YAML with target, task, setup, scripts, gates, judge, and matrix fields
          - config:      ax-eval-config.toml with supported config fields and valid profiles
          - script-gate: Shell script gate that reports pass/fail JSON
          - evaluator:   Custom evaluator script that reports metrics, score, and summary JSON

Options:
  -v, --verbose
          Enable verbose output (or set RUST_LOG for fine-grained control)

  -h, --help
          Print help (see a summary with '-h')
