chore: update claude configuration and rules from tzj/vs_offload

- Add /sc:git command with smart commit functionality
- Add /sc:ultra-think command for deep thinking
- Update .claude/rules/ with improved documentation:
  - commands.md: command usage guidelines
  - doc-management.md: documentation policy
  - no-extra-docs.md: documentation creation policy
  - gpu-testing.md: GPU type detection and testing rules
- Update .claude/settings.json with claude-flow MCP configuration

这些改进提供了更好的开发体验和工具支持。

.claude/rules/commands.md

@@ -1,20 +1,16 @@
 # Commands
 
-## Installation
+## Running (with PYTHONPATH)
 
-```bash
-pip install -e .
-```
-
-## Running
+For multi-instance development, use PYTHONPATH instead of pip install:
 
 ```bash
 # Run example
-python example.py
+PYTHONPATH=/path/to/nano-vllm:$PYTHONPATH python example.py
 
 # Run benchmarks
-python bench.py                    # Standard benchmark
-python bench_offload.py            # CPU offload benchmark
+PYTHONPATH=/path/to/nano-vllm:$PYTHONPATH python bench.py
+PYTHONPATH=/path/to/nano-vllm:$PYTHONPATH python bench_offload.py
 ```
 
 ## Config Defaults