Function getHasCookie

getHasCookie(key: string): boolean
Checks if a cookie exists.
Parameters
- key: string
  The name of the cookie to check
Returns boolean
True if the cookie exists, false otherwise
Example
```
if (getHasCookie('token')) {
  console.log('User is authenticated');
}

// Or use with getCookie
const hasSession = getHasCookie('sessionId');
```