feat(us-016): mining-style node startup CLI + live dashboard

- `meshnet-node` with no args runs interactive setup wizard on first run,
  then starts directly on subsequent runs using saved config
- Wizard auto-detects all GPUs/VRAM, shows curated model list with per-quant
  VRAM requirements, marks models that exceed available VRAM as incompatible,
  offers HuggingFace Hub browse as escape hatch
- Persistent config saved to ~/.config/meshnet/config.json (0o600)
- Live rich dashboard (tokens/sec EMA, VRAM, requests, peers, uptime) with
  automatic plain-text fallback when stdout is not a TTY (WSL2/SSH/CI)
- All wizard values overridable via CLI flags; --reset-config re-runs wizard
- `meshnet-node models` lists curated models; `--browse` fetches HF Hub top-20
- `meshnet-node config` prints saved config
- `meshnet-node start ...` preserved for backward compatibility
- 19 new tests; 97 passed, 1 skipped (no regressions)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/node/pyproject.toml

@@ -13,6 +13,7 @@ dependencies = [
     "huggingface-hub>=0.20",
     "accelerate>=0.28",
     "bitsandbytes>=0.43",
+    "rich>=13",
     "safetensors>=0.4",
     "torch>=2.1",
     "transformers>=4.39",