Feat: Add multi-stage control

[godind]

Add multi state switch that supports on, off, sleep, float, etc. Mostly used with chargers abd solar.

Multi state meta

{
"displayName": "Inverter Mode",
"type": "multiple",
"possibleValues": [
{
"title": "On",
"value": 3
},
{
"title": "Off",
"value": 4,
"isOn": false
},
{
"title": "Charger Only",
"value": 1,
"abbrev": "Chg"
},
{
"title": "Inverter Only",
"value": 2,
"abbrev": "Inv"
}
]
}