Add configuration examples for various devices and functionalities

- Introduced multivent ventilation configuration for managing multiple zones.
- Added PID heating batteries configuration for temperature control.
- Created relay GPIO switch configuration for controlling relays.
- Implemented RGBW LED strip configuration for lighting control.
- Added Modbus CO2 sensor configuration for environmental monitoring.
- Introduced Sonoff S26 humidity controller example for humidity management.
- Created sprinkler irrigation configuration for garden management.
- Added thermostat on/off relay configuration for heating and cooling control.
- Implemented ventilation fan monitoring configuration for performance tracking.
- Added core concepts documentation for LightHub, detailing items, commands, and execution objects.

documentation/modules/multivent_module_description.md

@@ -370,7 +370,7 @@ PWM-каналами. Запросы воздуха в зоны приходят
       "fanspeed": {"emit": "house/vent/fan",   "@V": null},
       "on":       {"emit": "house/vent/oncmd", "@V": null},
       "$temp":    {"item": "ac_multizone/val", "@S": null}
-    }], null, 8192, 0]
+    }], null]
   }
 }
 ```