Add suppport for displaying the actual value and step values in the USlider component

[Rednas83]

Description

Something like

marks: [
  { at: "minimum" }, // Display minimum value
  { at: "actual", label: (value: string) => `Actual value is ${value}` }, // Display actual value with custom label
  { at: "everystep" } // Display every step value 
  { at: "maximum" } // Display maximum value 
]

Additional context

No response