- Upgrade ls to long listing (-l -a) and drop the standalone l and lS functions in favor of abbreviations
- Remove llm (ambiguous name, redundant with ltr)
- Add lsr (reversed time oneline), lss (size-sorted), lD (dirs-only), lx (extension-sorted)
- Enhance ltr with --all and age color-scale gradient
- Wire up ls abbreviations: l, lS, lsR, lX, lT, lsT
- Update README functions table and add Listing abbreviations section
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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