Introduce style properties for disabled field colors

[rolfsmeds]

Describe your motivation

Input fields currently have style properties for their normal states, e.g. --vaadin-input-field-background and --vaadin-input-field-value-color, as well as some state-specific properties for when these cannot be used, e.g. --vaadin-input-field-invalid-background, but there are no corresponding global style properties for the disable state, which means that overriding the text and background color of disabled fields requires targeting the appropriate parts and states explicitly e.g.

vaadin-text-field[disabled]::part(input-field) {
    --lumo-disabled-text-color: red;
    background-color: green;
}

Describe the solution you'd like

Introduce style properties specific to the disabled state

• --vaadin-input-field-disabled-background
• --vaadin-input-field-disabled-value-color

Describe alternatives you've considered

No response

Additional context

No response