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>

codesys/README.md

@@ -0,0 +1,23 @@
+# CODESYS Project Files
+
+This folder contains the CODESYS Home Automation project and exports.
+
+## Files
+
+- **Home_Automation (1).project** — Binary CODESYS project (open in CODESYS IDE)
+- **Home_Automation.export** — CODESYS XML export (readable, full project)
+- **Home_Automation.xml** — PLCopen XML export (readable, program structure)
+- **Home_Automation.projectarchive** — Project archive
+
+## Parsing Exports
+
+From the project root:
+
+```bash
+python3 scripts/parse-codesys-xml.py codesys/Home_Automation.export
+python3 scripts/parse-codesys-xml.py codesys/Home_Automation.xml
+```
+
+## Documentation
+
+See [docs/codesys/](../docs/codesys/) for CODESYS documentation.