Function initials

initials(fullName?: string): string
Extracts the initials from a full name.

This function takes a full name as input and returns the initials in uppercase. If the full name is not provided, it returns an empty string.
Parameters
- OptionalfullName: string
  The full name to extract initials from.
Returns string
- The initials of the full name in uppercase.
Example
```
initials("John Doe"); // "JD"
initials("Alice Bob Carol"); // "ABC"
initials(); // ""
```
- Defined in utils/string/initials.ts:14