Function getDayName

getDayName(
    locale: string,
    day: number,
    format?: "short" | "long" | "narrow",
): string
Returns the localized name of a day of the week for a given locale and format.
Parameters
- locale: string
  The locale to use for formatting the day name.
- day: number
  The day of the week (0 for Sunday, 1 for Monday, etc.).
- Optionalformat: "short" | "long" | "narrow" = 'long'
  The format to use for the day name.
Returns string
The localized name of the day.
Example
```
console.log(getDayName('en', 0)); // 'Sunday'
console.log(getDayName('fr', 1, 'short')); // 'lun.'
```
- Defined in get-day-name.ts:13