[nxtman123]

Replace the handwritten parser and help renderer with Commander 14. Root help lists command groups; nested help exposes each action, its arguments, required options, and global options. Human and JSON help come from the same command tree, and --version returns version information.

Commander enforces command scope, positional arity, required options, and conflicting options before handlers run. The adapter preserves existing JSON error envelopes, exit codes, aliases, explicit no-* flags, and secret-safe diagnostics. Existing business handlers remain unchanged. Commander 14 preserves the Node 20.11 minimum.

Command-specific options must follow the full command path; global options can appear before or after it. Values starting with a dash use --option=VALUE, and option-like filenames follow --. README documents these conventions.

Validation:

• Clean npm install, public check, vendor integrity and source drift, typecheck, lint, and diff check passed.
• Full local suite: 566 passed, five existing compositor failures due to missing Liberation fonts, one skipped. CI installs the fonts and runs the full suite.
• Mock smoke, npm pack dry run, release artifact verification, and clean npm install smoke passed. Release includes all 19 exact runtime dependencies.
• Added coverage for nested discovery, required-option metadata, strict parsing, negated options, interspersed globals, dash-prefixed values, and secret-safe error envelopes.

Live-server, plugin, and Player validation were not run; no contracts or vendored snapshots changed.