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>

.gitignore

@@ -0,0 +1,47 @@
+# Secrets — never commit
+.env
+.env.secrets
+.env.services
+**/secrets.yaml
+**/secrets.yml
+
+# Docker volumes / data
+homeai-data/
+**/data/
+
+# Python
+__pycache__/
+*.pyc
+*.pyo
+.venv/
+venv/
+*.egg-info/
+
+# Node
+node_modules/
+dist/
+.cache/
+
+# macOS
+.DS_Store
+*.localized
+
+# Editor
+.vscode/
+*.swp
+*.swo
+
+# Ollama model cache (large binaries)
+*.gguf
+*.safetensors
+*.bin
+*.ckpt
+*.pt
+
+# ESPHome secrets
+homeai-esp32/esphome/secrets.yaml
+
+# Generated
+homeai-llm/benchmark-results.md
+homeai-character/characters/*.json
+!homeai-character/characters/.gitkeep