* feat: add ecc-recipes skill
Maps a described workflow to the right ECC command-group with run-order
and stop condition, and browses command-group recipe families. Fills the
gap between ecc-guide (flat catalog) and prompt-optimizer (single-prompt
match) by adding family grouping, run-order, and stop conditions.
Advisory only; reads commands/ live.
* fix(ecc-recipes): address review
- flatten frontmatter origin/author/version to top-level (repo convention)
- guard unset CMD_DIR before globbing; use find instead of ls
- show burn-warning explicitly in output template
* feat(ecc-recipes): add argument-hint for slash UI
