Pilot v2: Core implementation + battery telemetry

Major updates:
- Complete Rust rewrite (pilot-v2/) with working MQTT client
- Fixed MQTT event loop deadlock (background task pattern)
- Battery telemetry for Linux (auto-detected via /sys/class/power_supply)
- Home Assistant auto-discovery for all sensors and switches
- Comprehensive documentation (AVANCEMENT.md, CLAUDE.md, roadmap)
- Docker test environment with Mosquitto broker
- Helper scripts for development and testing

Features working:
✅ MQTT connectivity with LWT
✅ YAML configuration with validation
✅ Telemetry: CPU, memory, IP, battery (Linux)
✅ Commands: shutdown, reboot, sleep, screen (dry-run tested)
✅ HA discovery and integration
✅ Allowlist and cooldown protection

Ready for testing on real hardware.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

docker-compose.dev.yml

@@ -0,0 +1,18 @@
+version: '3.8'
+
+services:
+  mosquitto:
+    image: eclipse-mosquitto:2
+    container_name: pilot-mosquitto
+    ports:
+      - "1883:1883"
+      - "9001:9001"
+    volumes:
+      - ./config/mosquitto.conf:/mosquitto/config/mosquitto.conf
+    restart: unless-stopped
+    networks:
+      - pilot-net
+
+networks:
+  pilot-net:
+    driver: bridge