Feature: Add support for new device

[dwbboy]

Checks

• I have read the above text and I'm aware of the situation
• I have searched the existing issues and no issue is describing my issue
• I have installed the latest version

The feature you want to suggest

Device Information

• Model: DEEBOT T90 PRO 上下水款 (SHAKESPEARE_WH_AUTO)
• Class ID: jkzzec
• Protocol: REST/MQTT (JSON)
• Region: CN (jmq-ngiot-cn.dc.cn.ecouser.net)
• Features: Auto water refill/drain, OMNI station, roller mop

Compatibility Test (Optional)

[ ] Tested with T90 PRO (non-WH) model xxxxxx - works partially
[ ] Tested with T20/T30 OMNI model - not tested

Additional Info

Device appears in Ecovacs app normally. Requesting basic cleaning/mop/station control support.