fix: resolve merge conflicts from duplicate explore detail commands
Two branches independently added cap/skill detail commands and bare explore.
Kept feature branch implementations (with mergeExploreOpts for parent option
inheritance), removed duplicate HEAD versions, and deduplicated tests using
consistent nested JSON format (data.cap/data.skill) matching other explore
subcommands.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>