Update documentation for Home Assistant light management and room configuration

- Added a new section in README.md for creating and managing lights by room in Home Assistant, linking to a focused guide.
- Enhanced the all-lights-and-rooms.md documentation with a reference to the new guide for clarity on entity creation and room assignment.
- Made minor adjustments to the room-config.js file, commenting out outdated device-to-room mappings to improve code clarity.

This update improves the documentation and usability for users managing lights and rooms in Home Assistant.

node-red/room-config.js

@@ -56,10 +56,10 @@ const ROOM_CONFIG = {
     // out_side: 'outSide',
   },
 
-  // Zigbee: friendly_name → single room (fallback when switchBindings missing).
-  deviceToRoom: {
-    'Office Switch': 'cmd_livingroom',
-  },
+  // // Zigbee: friendly_name → single room (fallback when switchBindings missing).
+  // deviceToRoom: {
+  //   'Office Switch': 'cmd_livingroom',
+  // },
 
   // When using a multi-device Zigbee node, payload is keyed by IEEE (e.g. 0xa4c138a5b9771b05). Map IEEE → friendly name so switchBindings by name still works.
   deviceIdToName: {
@@ -79,7 +79,7 @@ const ROOM_CONFIG = {
   switchBindings: {
     'Office Switch': {
       1: { room: 'cmd_livingroom', light: 1 },  // button 1 → light 1
-      2: { room: 'cmd_livingroom', light: 1 },  // button 2 → light 1 (same light; other switches could do button 2 → light 2)
+      2: { room: 'cmd_livingroom', light: 2 },  // button 2 → light 1 (same light; other switches could do button 2 → light 2)
     },
   },
 };