fix: 131s add modes

[cdnninja]

Add mode data to 131 data. It supports, auto, 3 levels sleep and off.

Example from debug logs:

`2025-01-15 16:16:41,494 - DEBUG - API response: 

  {
  "code": 0,
  "msg": "request success",
  "traceId": "1736983000",
  "screenStatus": "off",
  "filterLife": {
    "change": false,
    "useHour": 962,
    "percent": 76
  },
  "activeTime": 351812,
  "timer": null,
  "scheduleCount": 0,
  "schedule": null,
  "levelNew": 0,
  "airQuality": "excellent",
  "level": null,
  "mode": "sleep",
  "deviceName": "Levoit 131S Air Purifier",
  "currentFirmVersion": "2.0.58",
  "childLock": "off",
  "deviceStatus": "on",
  "deviceImg": "https://image.vesync.com/defaultImages/deviceDefaultImages/airpurifier131_240.png",
  "connectionStatus": "online"
}`

[webdjoe]

Thank you for the PR! Please rebase with the master branch and I will merge.

[cdnninja]

Done.

[webdjoe]

Thank you, merging now. There is one more PR to merge before next release, should be shortly