Update Sugar Valley Neopool driver

[curzon01]

Description:

Add NPLight TOGGLE cmnd
Add NPFiltrationMode string parameter
Add filtration speed on result
Add undocumented register function
Fix NPLight get status
Fix hydrolysis status
Fix NPFiltration side effects
Fix pH warning
Fix hydrolysis/redox value
Fix register desc

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works on Tasmota core ESP8266 V.2.7.4.9
• The code change is tested and works with core ESP32 V.1.0.6
• I accept the CLA.