Function getCurrentWeekday

getCurrentWeekday(calendarId?: string): WeekdayData | null
Gets the details about the current weekday.

Returns
The current weekday data or null if no current weekday can be found.

Example
```
SimpleCalendar.api.getCurrentWeekday();
// Returns an object like this
// {
//     id: "b40f3a20",
//     name: "Tuesday",
//     abbreviation: "Tu",
//     description: "",
//     numericRepresentation: 3,
//     restday: false
// }
```
Parameters
- calendarId: string = 'active'
  
  Optional parameter to specify the ID of the calendar to get the current weekday from. If not provided the current active calendar will be used.
Returns WeekdayData | null