Function isValidWebsiteUrl

isValidWebsiteUrl(input: string): boolean
Checks whether a string is a usable website/social-media URL.

Mirrors the backend Validators::WebsiteValidator.
Parameters
- input: string
  The URL string to validate.
Returns boolean
True if the value is a valid website URL.
Example
```
isValidWebsiteUrl("example.com"); // true (https:// assumed)
isValidWebsiteUrl("https://example.co.uk"); // true
isValidWebsiteUrl("localhost"); // false (single-label host)
isValidWebsiteUrl("ftp://example.com"); // false (unsupported scheme)
```
- Defined in utils/url/index.ts:14