feat(spotify): implement milestone M1 scaffold

skills/spotify/SKILL.md

@@ -0,0 +1,20 @@
+---
+name: spotify
+description: Search Spotify tracks, create and manage playlists, and import songs from text files, M3U playlists, or music folders.
+metadata: {"clawdbot":{"emoji":"music","requires":{"bins":["node"]}}}
+---
+
+# Spotify
+
+Use this skill when the user wants to search Spotify tracks, create playlists, add or remove playlist tracks, or import songs from a text list, M3U/M3U8 playlist, or local music folder.
+
+Use the local helper from the installed skill directory:
+
+```bash
+cd ~/.openclaw/workspace/skills/spotify
+scripts/spotify --help
+```
+
+This skill uses the Spotify Web API with OAuth2 Authorization Code + PKCE. It does not use browser automation for Spotify operations and does not need a Spotify client secret.
+
+Do not print token files or OAuth callback data. Use `--json` for machine-readable command output.