[Enhancement] Float values vs string values

[alnavasa]

Some sensors such us print core, printer status or printed type should be a string, not a float, not possible to manage the history with float values for strings, and therefore automations harder to program (when going from printing to paused)

(Float values -> numbers
String values -> text)

[RedwoodForest]

Based on my local testing it seems like changing the unit of measurement for these sensors from "" to None fixes this issue. For example:

    "status": ["Printer status", None, "mdi:printer-3d"],

[alnavasa]

State_class: measurement

Does help too