feat: add --help/-h flags and CLI list argument parsing#34
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- `ilo --help` and `ilo -h` now show help text (previously treated as inline code) - CLI can now pass list arguments: `[1,2,3]` (bracketed) or `1,2,3` (bare comma) - Add 6 integration tests covering both features - Update README.md, SPEC.md, and help text with list arg examples
Bracket syntax requires shell quoting — show 1,2,3 as primary form.
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Summary
ilo --helpandilo -hnow show help text (previously treated as inline code, outputting empty AST)[1,2,3](bracketed) or1,2,3(bare comma) syntaxTest plan
cargo test— all 414 tests pass (374 unit + 40 integration)--help,-h, bracketed list args, bare comma list argsilo --help,ilo -h,ilo 'f xs:L n>n;len xs' '[1,2,3]'→ 3