refactor: unify skill source model

catalog.yaml

@@ -0,0 +1,31 @@
+# Preconfigured Skill source catalog
+# Format:
+#   <name>:
+#     repo: <git-url>
+#     ref: <branch|tag>     (default: main)
+#     path: <subpath>       (default: .)
+#     description: <text>   (optional, shown by `skiff select`)
+#     tags:                 (optional)
+#       - <tag>
+#
+# Single-skill example (`path` contains SKILL.md):
+#   example-skills:
+#     repo: https://github.com/example/skills
+#     ref: main
+#     path: .
+#
+# Collection example (`path` contains skill directories):
+#   example-collection:
+#     repo: https://github.com/example/skill-collection
+#     ref: main
+#     path: skills
+
+waza:
+  repo: https://github.com/tw93/Waza.git
+  ref: main
+  path: skills
+  description: Waza engineering workflow skills for planning, UI, review, debugging, writing, research, reading, and agent health.
+  tags:
+    - engineering
+    - workflow
+    - skill-collection