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refactor(argparse): use Array::any in has_options / has_long_option / has_short_option

Three boolean-reduction loops in argparse/help_render.mbt all matched
the same shape: walk `args`, return `true` on match, return `false` if
none. Replace with `args.any(...)`:

- `has_options(cmd)`
- `has_long_option(args, name)`
- `has_short_option(args, value)`

Bundled because the change is identical in shape and the three sites
sit within ~30 lines of each other.

Semantics-preserving: `moon test -p argparse` (225/225) passes and
`moon info` produces no `.mbti` change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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