Support traditional key syntax (for example `tar cvf archive.tar file`)
by rewriting a leading key operand into clap-compatible short options
before argument parsing.
- detect valid keystrings in argv[1]
- expand key letters into `-<opt>` arguments
- consume operands for `f` and `b` in key order
- forward `-b` (currently unsupported) so key/dash forms fail consistently
- update usage text to document key syntax
- add unit tests for key detection/expansion
- add integration tests for create/extract parity and `-b` failure parity
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Jeff Baileyandcopilot-swe-agent[bot]
42a1c34222