Refactor room and light configurations for Node-RED integration

- Updated global variable lists in GVL_IO.gvl and GVL_NVL_placeholders.gvl to reflect new room naming conventions and structures.
- Revised PLC_App.st to map new room configurations for lighting control.
- Enhanced documentation in all-lights-and-rooms.md and ha-lights-and-rooms.md to align with updated room and light entity naming.
- Adjusted room-config.js and related Node-RED flows to support the new configuration structure.

This update improves the organization and clarity of room and light management within the Node-RED integration, ensuring consistency across the system.

docs/Electrical/naming_rules.md

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+# Uniform lighting naming rules
+
+This project uses one canonical naming strategy for CODESYS, Node-RED, and Home Assistant.
+
+## 1) Canonical token format
+
+- All tokens are `snake_case`.
+- Allowed chars: `a-z`, `0-9`, `_`.
+- Normalize free text by:
+  - lowercasing
+  - trimming spaces
+  - replacing spaces and dashes with `_`
+  - collapsing repeated `_`
+  - applying typo fixes (`ktchen -> kitchen`, `guiest -> guest`, `wachine -> laundry`)
+
+## 2) Canonical data columns
+
+Source of truth is `lights_zones_canonical.csv` with:
+
+- `circuit_no`
+- `zone`
+- `area`
+- `room`
+- `light_type`
+- `index` (duplicate counter for same area+room+light_type)
+- `light_no` (PLC light channel inside room, 1..6)
+- `codesys_in_key`
+- `codesys_out_key`
+- `nodered_room_key`
+- `ha_entity_id`
+
+## 3) ID generation formulas
+
+- `codesys_in_key` = `<area>_<room>`
+- `codesys_out_key` = `l_<area>_<room>`
+- `nodered_room_key` = `<area>_<room>`
+- `ha_entity_id` = `input_boolean.<area>_<room>_<light_type>_<index>`
+
+Examples:
+
+- `input_boolean.open_plan_living_room_main_1`
+- `open_plan_guest_wc`
+- `l_master_bedroom_suite`
+
+## 4) PLC mapping rule
+
+- `light_no` maps to CODESYS `l_<N>` and Node-RED `light`:
+  - `light_no = 1` -> `l_1`
+  - `light_no = 2` -> `l_2`
+  - ...
+  - `light_no = 6` -> `l_6`
+
+## 5) Reserved room keys used in this migration
+
+- `open_plan_living_room`
+- `open_plan_dining_room`
+- `open_plan_entrance`
+- `open_plan_guest_wc`
+- `kitchen_kitchen`
+- `kitchen_pantry`
+- `bedrooms_office`
+- `bedrooms_hallway`
+- `bedrooms_laundry`
+- `bedrooms_shower`
+- `bedrooms_bedroom`
+- `master_bedroom_suite`
+- `master_bedroom_bathroom`
+- `exterior_veranda`
+- `exterior_entrance`
+- `exterior_yard`