feat: add managed skills gating

skills/spotify-player/SKILL.md

@@ -0,0 +1,15 @@
+---
+name: spotify-player
+description: Control Spotify playback from the terminal.
+metadata: {"clawdis":{"requires":{"bins":["spotify-player"]}}}
+---
+
+# spotify-player
+
+Use `spotify-player` to search, queue, and control playback.
+
+```bash
+spotify-player --help
+```
+
+Confirm the device/target if multiple are available.