Update both English and Chinese README files to reflect the major platform positioning shift and new capabilities:
**Platform Positioning**
- Update tagline: "From Provider Switcher to All-in-One AI CLI Management Platform"
- Emphasize unified management of configurations, MCP, Skills, and Prompts
**v3.7.0 Highlights**
- Gemini CLI Integration: Third supported AI CLI with dual-file config
- Claude Skills Management: GitHub integration, lifecycle management
- Prompts Management: Multi-preset system with Markdown editor
- MCP v3.7.0 Unified Architecture: SSE transport, smart parser, cross-app sync
- Deep Link Protocol: ccswitch:// for one-click config sharing
- Environment Conflict Detection: Auto-detect and resolve config conflicts
**Documentation Updates**
- Add v3.7.0 release notes link
- Expand Quick Start with Skills and Prompts management guides
- Update configuration files section with Gemini environment variables
- Add ShanDianShuo sponsor logos and information
**Technical Details**
- 18,000+ lines of new code across 6 core features
- Cross-app support for Claude Code, Codex, and Gemini CLI
- Complete usage instructions for new management systems
- Add PackyCode to sponsor section in README (both EN/ZH)
- Add PackyCode logo to assets/partners/logos/
- Mark PackyCode as partner in provider presets (Claude & Codex)
- Add promotion message to i18n files with 10% discount info
