feat(skills): add MiniMax-AI/cli as default skill tap

[octo-patch]

Summary

• Add MiniMax-AI/cli (skill/ path) to the example skill URLs in the Connect Skill guide so the mmx-cli skill is discoverable out of the box
• Users can install via the Connect Skill dialog — the SKILL.md is fetched directly from MiniMax-AI/cli
• Skill updates are fully decoupled: MiniMax maintains the upstream SKILL.md, no changes needed in this project

8 lines changed, 0 new files.

What is mmx-cli?

mmx-cli is a CLI tool for the MiniMax AI platform, providing:

• Text generation (MiniMax-M2.7 model)
• Image generation (image-01)
• Video generation (Hailuo-2.3)
• Speech synthesis (speech-2.8-hd, 300+ voices)
• Music generation (music-2.6, with lyrics, cover, and instrumental)
• Web search

The SKILL.md follows the agentskills.io standard.

Test plan

• Open the Connect Skill dialog → the mmx-cli example URL appears in the guide
• Paste https://github.com/MiniMax-AI/cli/tree/main/skill into the GitHub URL field → skill installs successfully
• Ask agent "generate a jazz instrumental" — agent invokes mmx music generate via terminal