Add support for Govee Downlights 
* **Which model is this? Need the `Hxxxx` number.**
H608A


* **Which type of device is this? Light, heater, leak sensor, etc.**
Light


* **Which connection methods does this device have? Wifi? Bluetooth? LAN mode? All?**
All


* **Anything else?**
running plugin version 10.0.0
Log message on startup of homebridge:

[Downlights] is not currently supported, do create a Github issue with the following info:
{"ip":"192.168.1.125","device":"23:55:CC:38:32:34:0C:61","sku":"H608A","bleVersionHard":"3.05.00","bleVersionSoft":"1.00.11","wifiVersionHard":"1.04.01","wifiVersionSoft":"1.00.12","httpInfo":{"groupId":0,"device":"23:55:CC:38:32:34:0C:61","sku":"H608A","spec":"","versionHard":"3.05.00","versionSoft":"1.00.11","deviceName":"Downlights","deviceExt":{"deviceSettings":"{\"wifiName\":\"MyWiFi\",\"address\":\"CC:38:32:34:0C:61\",\"bleName\":\"Govee_H608A_0C61\",\"topic\":\"GD/05093c886dfa9bef20defa2fa779a80e\",\"wifiMac\":\"60:74:F4:74:A0:D2\",\"pactType\":1,\"pactCode\":1,\"wifiSoftVersion\":\"1.00.12\",\"wifiHardVersion\":\"1.04.01\",\"ic\":25,\"secretCode\":\"7tPMODI0DGE=\",\"boilWaterCompletedNotiOnOff\":1,\"completionNotiOnOff\":1,\"autoShutDownOnOff\":1,\"sku\":\"H608A\",\"device\":\"23:55:CC:38:32:34:0C:61\",\"deviceName\":\"Downlights\",\"versionHard\":\"3.05.00\",\"versionSoft\":\"1.00.11\",\"playState\":false}","lastDeviceData":"{\"online\":false}","extResources":"{\"skuUrl\":\"https://d1f2504ijhdyjw.cloudfront.net/sku-img/9744be7e073fcffe0bf9ede942f3ec9c-add_list_type_device_608a.png\",\"headOnImg\":\"https://d1f2504ijhdyjw.cloudfront.net/sku-img/c640be97842bcc721a8c6f7c7a04f514-608a_light_title_on.png\",\"headOffImg\":\"https://d1f2504ijhdyjw.cloudfront.net/sku-img/53dabf789b616f94ed3a71a36bcde0e9-608a_light_title_off.png\",\"ext\":\"\",\"ic\":25}"},"pactType":1,"pactCode":1,"share":0,"goodsType":184,"attributesId":69,"supportScene":0},"model":"H608A","deviceName":"Downlights","isLANDevice":true}
