Generate CLI reference for evalprotocol.io

[dphuang2]

Note

Adds a hidden export-docs command to generate CLI reference markdown and refactors the CLI parser with improved help text and subparser handling.

• CLI:
  • Parser Refactor: Introduces build_parser() and _configure_parser(); parse_args() now uses the built parser.
  • Help Improvements: Expanded, clearer help for create rft options (training, inference, W&B, etc.).
  • Hidden Command: Adds export-docs subcommand with --output to generate CLI docs; updates main() to dispatch it.
  • Subparser UX: _hide_suppressed_subparsers() hides suppressed commands from help output.
• Docs Generation:
  • Adds eval_protocol/cli_commands/export_docs.py to introspect the argparse tree and emit a single Markdown reference with Mintlify components, global options, and per-command sections, excluding hidden commands.

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