This function validates a URL by checking the presence of a scheme and a
hostname in the parsed URL.
Usage
is_valid_url(url)
Value
A logical value: TRUE if the URL is valid, FALSE otherwise.
Arguments
url
A character string representing the URL to be checked.
Author
Steven P. Sanderson II, MPH
Details
The function uses the httr2::url_parse function to parse the URL
and checks if the parsed URL contains a scheme and a hostname. If either
is missing, the URL is considered invalid.