Add StartUpOnOff and GlobalSceneControl attributes to On/Off cluster

Adds the two On/Off cluster (0x0006) attributes missing per ZCL spec r8:
- globalSceneControl (0x4000, bool)
- startUpOnOff (0x4003, enum8) with spec values off/on/toggle/previous
  per Table 3-46, enabling power-on behavior configuration.

Author: RobinBol

index.d.ts

@@ -226,8 +226,10 @@ declare module "zigbee-clusters" {
   }
   type OnOffClusterAttributes = {
     onOff: { id: 0x00, type: ZCLDataType<boolean> },
+    globalSceneControl: { id: 0x4000, type: ZCLDataType<boolean> },
     onTime: { id: 0x4001, type: ZCLDataType<number> },
     offWaitTime: { id: 0x4002, type: ZCLDataType<number> },
+    startUpOnOff: { id: 0x4003, type: ZCLDataType<"off" | "on" | "toggle" | "previous"> },
   };
   type OnOffClusterCommands = {
     setOff: { id: 0x00, direction: "DIRECTION_SERVER_TO_CLIENT" },

lib/clusters/onOff.js

@@ -5,8 +5,18 @@ const { ZCLDataTypes } = require('../zclTypes');
 
 const ATTRIBUTES = {
   onOff: { id: 0, type: ZCLDataTypes.bool },
+  globalSceneControl: { id: 16384, type: ZCLDataTypes.bool },
   onTime: { id: 16385, type: ZCLDataTypes.uint16 },
   offWaitTime: { id: 16386, type: ZCLDataTypes.uint16 },
+  startUpOnOff: {
+    id: 16387,
+    type: ZCLDataTypes.enum8({
+      off: 0,
+      on: 1,
+      toggle: 2,
+      previous: 255,
+    }),
+  },
 };
 
 const COMMANDS = {