docs: sync translated READMEs with main README structure

Updated all translated READMEs (Chinese, Japanese, Korean) to match the main README.md structure:

Changes:
- Updated Framework Statistics (3 plugins, 16 agents, 7 modes, 8 MCP servers)
- Added Disclaimer section
- Added Developer & Contributors documentation table
- Restructured installation section with v4.1.8 and v5.0 details
- Expanded "What's New in v4.1" (6 subsections)
- Added complete "Deep Research Capabilities" section (8 subsections)
- Updated Documentation section with correct counts
- Fixed all path references and command descriptions

Structure Consistency: 58/58 headings (100/100 score)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: mithun50