feat: performance improvement and Qwen3 support

[drunkcoding]

Description

Major changes for performance improvement

Motivation

• Support latest QWen3 MoE model
• Overlap hidden states gather with expert copy
• Reduce torch kernel launch overhead

Type of Change

• [ ] Bug fix
• [x] New feature
• [x] Breaking change
• [x] Documentation update

Checklist

• [x] I have read the CONTRIBUTION guide.
• [ ] I have updated the tests (if applicable).
• [x] I have updated the documentation (if applicable).