Add self-deploying setup scripts for all sub-projects (P1-P8)

- Root setup.sh orchestrator with per-phase dispatch (./setup.sh p1..p8 | all | status)
- Makefile convenience targets (make infra, make llm, make status, etc.)
- scripts/common.sh: shared bash library for OS detection, Docker helpers,
  service management (launchd/systemd), package install, env management
- .env.example + .gitignore: shared config template and secret exclusions

P1 (homeai-infra): full implementation
- docker-compose.yml: Uptime Kuma, code-server, n8n
- Note: Home Assistant, Portainer, Gitea are pre-existing instances
- setup.sh: Docker install, homeai network, container health checks

P2 (homeai-llm): full implementation
- Ollama native install with CUDA/ROCm/Metal auto-detection
- launchd plist (macOS) + systemd service (Linux) for auto-start
- scripts/pull-models.sh: idempotent model puller from manifest
- scripts/benchmark.sh: tokens/sec measurement per model
- Open WebUI on port 3030 (avoids Gitea :3000 conflict)

P3-P8: working stubs with prerequisite checks and TODO sections

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

.env.example

@@ -0,0 +1,46 @@
+# HomeAI — Shared Configuration Template
+# Copy to .env and fill in your values.
+# .env is gitignored — never commit it.
+
+# ─── Data & Paths ──────────────────────────────────────────────────────────────
+DATA_DIR=${HOME}/homeai-data
+REPO_DIR=${HOME}/Projects/HomeAI
+
+# ─── Network ───────────────────────────────────────────────────────────────────
+# Set to your machine's local IP (not 127.0.0.1)
+HOST_IP=192.168.1.100
+
+# ─── P1: Infrastructure ────────────────────────────────────────────────────────
+# Pre-existing instances — set these to your actual URLs
+HA_URL=http://localhost:8123
+HA_TOKEN=                        # Generated in Home Assistant UI → Profile → Security
+PORTAINER_URL=https://localhost:9443
+GITEA_URL=http://localhost:3000
+
+# Managed by homeai-infra docker-compose
+UPTIME_KUMA_URL=http://localhost:3001
+CODE_SERVER_URL=http://localhost:8090
+CODE_SERVER_PASS=               # Set in homeai-infra/docker/.env
+N8N_URL=http://localhost:5678
+N8N_USER=admin
+N8N_PASS=                       # Set in homeai-infra/docker/.env
+
+# ─── P2: LLM ───────────────────────────────────────────────────────────────────
+OLLAMA_URL=http://localhost:11434
+OLLAMA_API_URL=http://localhost:11434/v1
+OPEN_WEBUI_URL=http://localhost:3030
+OLLAMA_PRIMARY_MODEL=llama3.3:70b
+OLLAMA_FAST_MODEL=qwen2.5:7b
+
+# ─── P3: Voice ─────────────────────────────────────────────────────────────────
+WYOMING_STT_URL=tcp://localhost:10300
+WYOMING_TTS_URL=tcp://localhost:10301
+
+# ─── P4: Agent ─────────────────────────────────────────────────────────────────
+OPENCLAW_URL=http://localhost:8080
+
+# ─── P7: Visual ────────────────────────────────────────────────────────────────
+VTUBE_WS_URL=ws://localhost:8001
+
+# ─── P8: Images ────────────────────────────────────────────────────────────────
+COMFYUI_URL=http://localhost:8188