feat: add function to return all valid enum values

[ernado]

// Measurement unit.
type SemanticsUnit string

const (
	SemanticsUnitBytes          SemanticsUnit = "bytes"
	SemanticsUnitSeconds        SemanticsUnit = "seconds"
	SemanticsUnitMilliseconds   SemanticsUnit = "milliseconds"
	SemanticsUnitMicroseconds   SemanticsUnit = "microseconds"
	SemanticsUnitNanoseconds    SemanticsUnit = "nanoseconds"
	SemanticsUnitBytesPerSecond SemanticsUnit = "bytes per second"
	SemanticsUnitHertz          SemanticsUnit = "hertz"
)

unit:
  type: string
  description: Measurement unit
  enum:
    - bytes
    - seconds
    - milliseconds
    - microseconds
    - nanoseconds
    - bytes per second
    - hertz

Something like that:

func AllSemanticsUnitValues() []SemanticsUnit {
    return []SemanticsUnit{
        SemanticsUnitHertz,
        // ...
    }

}