capitalize 
Converts the first character of string to upper case and the remaining to lower case.
Signature 
typescript
function capitalize<T extends string>(str: T): Capitalize<T>;Parameters 
str (T): The string to be converted to uppercase.
Returns 
(Capitalize<string>): The capitalized string.
Examples 
typescript
import { capitalize } from 'es-toolkit/string';
capitalize('fred'); // returns 'Fred'
capitalize('FRED'); // returns 'Fred'
