Initial commit: Home automation docs and CODESYS project

- Reorganized project: codesys/, docs/codesys|redesign|integration|reference/, scripts/
- CODESYS project and exports in codesys/
- Documentation index in docs/README.md
- Redesign and light naming configuration
- Water boiler control and safety design

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/integration/nodered.md

@@ -0,0 +1,95 @@
+# Node-RED Configuration
+
+## Overview
+
+Node-RED provides flow-based programming for automation logic and acts as a bridge between CODESYS, MQTT, and Home Assistant.
+
+## Installation
+
+- **Version**: [To be filled]
+- **Installation Method**: [To be filled]
+- **Host**: [To be filled]
+- **Port**: [To be filled]
+
+## Main Flows
+
+### Flow 1: [Name]
+
+**Purpose**: [Description]
+
+**Nodes Used**:
+- [Node type]: [Function]
+
+**Logic**: [Description]
+
+### Flow 2: [Name]
+
+[Similar structure]
+
+## CODESYS Integration
+
+### Network Variable Nodes
+
+- **Connection Method**: [To be filled]
+- **Variables Mapped**: [To be filled]
+- **Update Frequency**: [To be filled]
+
+## MQTT Integration
+
+### Subscribed Topics
+
+| Topic | QoS | Function | Description |
+|-------|-----|----------|-------------|
+| [Topic] | [QoS] | [Function] | [Description] |
+
+### Published Topics
+
+| Topic | QoS | Function | Description |
+|-------|-----|----------|-------------|
+| [Topic] | [QoS] | [Function] | [Description] |
+
+## Home Assistant Integration
+
+- **Integration Method**: [MQTT, HTTP, API, etc.]
+- **Entities Created**: [To be filled]
+- **Automations**: [To be filled]
+
+## Custom Functions
+
+### JavaScript Functions
+
+```javascript
+// [Function name and description]
+// [Code if available]
+```
+
+## Error Handling
+
+- **Error Nodes**: [To be filled]
+- **Retry Logic**: [To be filled]
+- **Fallback Behaviors**: [To be filled]
+
+## Flow Export
+
+[If available, include flow export or reference to flow file]
+
+## Dashboard (if used)
+
+- **Dashboard Nodes**: [To be filled]
+- **UI Components**: [To be filled]
+
+## Troubleshooting
+
+### Common Issues
+
+- [Issue]: [Solution]
+
+### Debugging
+
+- How to enable debug messages
+- Flow validation
+- Message inspection
+
+---
+
+**Status**: Template - needs flow details