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

[octo-patch]

Summary

• Add minimax/mmx-cli skill entry to skills_template_config.yaml so the mmx-cli skill is discoverable out of the box
• Add configs/agent-skills/minimax/mmx-cli/SKILL.md sourced from MiniMax-AI/cli, following the same pattern as existing MiniMax skills
• Follows the existing convention used by minimax-docx, minimax-xlsx, fullstack-dev, frontend-dev, and pptx-generator

2 files changed: 1 new SKILL.md + 6 lines in skills_template_config.yaml.

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 and includes agent-specific flags (--non-interactive, --quiet, --output json).

Test plan

• minimax/mmx-cli skill appears in the skill browser
• Ask agent "generate a jazz instrumental" — agent invokes mmx music generate via terminal