feat: initial myprimal MQTT bridge service

Dynamic MySolem/MyIndygo IoT bridge with MQTT, Home Assistant
autodiscovery, and Homebridge EasyMQTT compatibility.

- Device discovery via MySolem API on startup (all modules/inputs/outputs)
- Configurable poll engine (fast/normal/slow buckets, per-input overrides)
- MQTT retained state publishing + HA autodiscovery payloads
- Unified manual command routing (linesControl vs sendManualModuleCommand)
- Runtime config via MQTT $config/set, persisted to config.json
- Expression override system (API-provided > hardcoded > passthrough)
- Minimal REST API: /health, /state, /control, /rediscover
- Docker deployment (Dockerfile + docker-compose.yml)
- 38 unit tests

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

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "myprimal",
+  "version": "1.0.0",
+  "description": "MySolem/MyIndygo IoT bridge — MQTT + Home Assistant autodiscovery",
+  "main": "src/index.js",
+  "scripts": {
+    "start": "node src/index.js",
+    "dev": "nodemon src/index.js",
+    "test": "jest"
+  },
+  "dependencies": {
+    "axios": "^1.7.0",
+    "axios-cookiejar-support": "^4.0.0",
+    "dotenv": "^16.4.5",
+    "express": "^4.19.2",
+    "mqtt": "^5.0.0",
+    "tough-cookie": "^4.1.4"
+  },
+  "devDependencies": {
+    "jest": "^30.4.2",
+    "nodemon": "^3.1.0"
+  }
+}