feat: add managed skills gating

skills/blucli/SKILL.md

@@ -0,0 +1,15 @@
+---
+name: blucli
+description: Control BluOS players from the CLI.
+metadata: {"clawdis":{"requires":{"bins":["blucli"]}}}
+---
+
+# blucli
+
+Use `blucli` to control BluOS players. Start with:
+
+```bash
+blucli --help
+```
+
+Confirm target player before changing playback.