docs(windows): flesh out Dell P16s spec with full hardware details + use cases
Expanded from 7-line raw system info to full spec document:
- CPU (Ryzen 7 PRO 7840U Zen 4, 8c/16t, AVX-512, NPU)
- GPU (Radeon 780M RDNA 3 iGPU, DirectML/ROCm)
- RAM (32GB DDR5, 24GB usable, VRAM allocation explained)
- Capabilities assessment (dev workstation, light AI, remote dev)
- AI/ML section (Ollama CPU, ROCm experimental, Ryzen AI NPU)
- Portable dev setup diagram + OpenClaw client use case
- 4-machine comparison table
- Optimization tips (reclaim RAM from iGPU, WSL2 memory limit)
- BIOS recommendations