Add multi-agent collaboration system with 16-person team and two-tier governance

- agents/README.md documents company principles (first principles + practical
  delivery), 6-stage collaboration flow, and two-tier governance: CEO has
  highest priority and final say; work groups self-govern internally for
  staffing, scheduling, technical choices within CEO-defined boundaries.
- 16 employees recruited to match CPU physical core count, enabling up to
  16 subagents to run in parallel. Each profile.md has independent name,
  background, strengths, weaknesses, and performance log.
- Roles: 1 CEO, 3 architects (lin/yang/huang), 5 engineers (zhao/chen/li/
  zhou/sun), 3 QA (wang/liu/xu), 2 DevOps (ma/hu), 1 designer (zhu),
  1 writer (deng), 1 security (cao).
- Five working groups defined under agents/groups/: grp-quality-core,
  grp-ai-plugins, grp-cli-ux (B3), grp-build-matrix, grp-security-audit.

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

Co-Authored-By: Claude <noreply@anthropic.com>

agents/groups/grp-build-matrix.md

@@ -0,0 +1,16 @@
+---
+group_id: grp-build-matrix
+name: 构建矩阵小组
+members:
+  - devops-ma
+  - devops-hu
+mission: 完善 CI 跨平台构建矩阵（Linux/Windows，Clang/MSVC），缩短构建时间
+lead: devops-ma
+created: 2026-05-27
+active_tasks: []
+standby: true
+---
+
+## 协作模式
+- 马奔：编写 GitHub Actions workflow
+- 胡桐：维护 CMake / Conan 配置在多编译器下的兼容性