type Skill struct {
Name string// directory name (e.g., "go-testing") DisplayName string// from first # heading in SKILL.md Description string// first paragraph after heading Dir string// absolute path to skill directory}
Discover scans skill directories and returns available skills.
Project-level skills (.moa/skills/) override global ones (~/.config/moa/skills/)
when they share the same name. Results are sorted by name.