Add minimax-music-playlist-cn: Chinese-optimized music playlist skill

[shin4]

Description

This PR adds a Chinese-optimized version of the minimax-music-playlist skill, designed for users who primarily use Chinese music streaming platforms.

Motivation

The official minimax-music-playlist v2.0 focuses on Apple Music, Spotify, and local NetEase files — which are difficult to access for Chinese users. This CN version provides an alternative that:

1. Parses online share links from QQ Music, NetEase Cloud Music, and Qishui Music via public APIs
2. Works cross-platform (Windows, Linux, macOS, Docker) without macOS-specific tools
3. Zero Python dependencies — uses only urllib from stdlib

Features

• Online-first: Parse playlist share links via public APIs (no local file access needed)
• Cross-platform: Works on Windows, Linux, macOS, Docker
• Zero dependencies: Pure Python stdlib (urllib, json, re)
• Smart genre analysis: Uses the official artist_genre_map.json (23,000+ artists including 1,400+ Chinese artists)

Supported Platforms

Platform	API Endpoint	Required Header
QQ Music	c.y.qq.com/qzone/fcg-bin/fcg_ucc_getcdinfo_byids_cp.fcg	Referer: https://y.qq.com/
NetEase	music.163.com/api/v3/playlist/detail	Referer: https://music.163.com/
Qishui	Browser rendering (requires browser_navigate tool)	N/A

Files Added

skills/minimax-music-playlist-cn/
├── SKILL.md                    # Main skill documentation (Chinese)
├── playlist_parser.py          # Python parser (pure stdlib)
├── data/
│   └── artist_genre_map.json   # 23,000+ artist genre mappings
└── README.md                   # English documentation

Differences from Official v2.0

Aspect	Official v2.0	CN Version
Data sources	Apple Music, Spotify, NetEase (local files)	QQ Music, NetEase, Qishui (online links)
Platform	macOS-focused	Cross-platform
Generation	Parallel (& + wait)	Serial (more reliable)
Cover art	mmx image generate	Removed (simplified)
playlist.json	Save metadata	Removed (simplified)

Notes

• The SKILL.md is written in Chinese as it targets Chinese users
• The README.md is in English for international contributors
• This skill can coexist with the official minimax-music-playlist skill